There are generally two forms of artistic manhole covers.
The first type is the colored manhole cover.
The second type is the copper-faced manhole cover.

Let’s start with the first type, the colored manhole cover. Colored manhole covers are usually made by applying outdoor wear-resistant resin, fluorocarbon and other materials on the surface of cast iron manhole covers. Generally, the way manhole covers are made in Japan falls into this category.

Let’s talk about the second type, the copper-faced manhole cover.
There are four methods to make copper surface manhole covers with the effects of bronze, brass or red copper.
1. Casting bronze or red copper requires a large amount of copper and is relatively expensive, but it is suitable for long-term use.
2. Using cast iron as the load-bearing base and placing an 8-millimeter thick embossed copper plate in the surface grooves, the two materials are physically combined to form a complete finished manhole cover. This method is suitable for small batches and can be used for a long time.
3. Casting patterns and characters with cast iron and covering the surface with a 0.5 – 1-millimeter thick layer of bronze, brass or red copper by laser. This can reduce production costs. It can be used for 6-8 years without wearing out, and even if it wears out, it still looks good, making it suitable for long-term use.
4. Casting patterns and characters with cast iron and electroplating a 0.1-millimeter thick layer of bronze, brass or red copper on the surface to reduce production costs. It can be used for one year before wearing out, but it is very cheap and not suitable for long-term use.

The industry principles and charging standards for custom sign products vary depending on factors such as application scenarios, materials, processes, and design complexity. The following is an overview of the general principles and charging standards in the custom sign industry:
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### Industry Principles
1. **Customer Needs First**
– Customized sign production prioritizes meeting customer needs, including functionality, aesthetics, and brand consistency.
– Designers must communicate thoroughly with customers to ensure that the design solutions meet their expectations.
2. **Quality Assurance**
– Sign production must comply with industry standards to ensure durability, clarity, and safety.
– Material selection, production processes, and installation procedures should all be strictly controlled.
3. **Environmental Protection and Sustainability**
– Prioritize the use of eco-friendly materials to minimize environmental impact.
– Consider energy conservation and recyclability in the design and production processes.
4. **Combining Innovation with Practicality**
– Integrate innovative elements into the design while ensuring the practicality and readability of the signs.
– Design appropriate signs for different scenarios (such as indoor, outdoor, and traffic).
5. **Compliance**
– Signage design must comply with relevant laws, regulations, and industry standards. For instance, traffic signs should conform to the national standard (GB/T 18833-2012).
– Signs used in public places should take into account barrier-free design to ensure that they are accessible to everyone.
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### **Charging Standards**
The charging standards for customizing signs are usually based on the following factors:
#### 1. **Material Costs**
– The prices of different materials vary significantly. Common materials include:
– **Metals**: Stainless steel, aluminum sheets, copper, etc.
– **Plastics**: Acrylic, PVC, etc.
– **Wood**: Solid wood, density board, etc.
– **Glass**: Tempered glass, laminated glass, etc.
– **Electronic Materials**: LED displays, touch screens, etc.
– The choice of materials directly affects the cost. For instance, high-end metals or electronic materials are usually more expensive.
#### 2. **Design Costs**
– **Complexity of Design**: Simple text sign design costs less, while complex graphics, 3D effects, or customized designs cost more.
– **Designer’s Experience**: Senior designers usually charge more than junior designers.
– **Design Tools**: If high-end design software or special techniques (such as AR/VR design) are required, the cost may increase.
#### 3. **Manufacturing Process**
– **Printing Techniques**: Screen printing, UV printing, digital printing, etc.
– **Engraving Techniques**: Laser engraving, mechanical engraving, etc.
– **Surface Treatment**: Spray painting, electroplating, polishing, etc.
– **Assembly and Installation**: Complex structure signs may require additional assembly and installation fees.
#### 4. **Size and Quantity**
– **Size**: The larger the size of the sign, the more material is used and the higher the production cost.
– **Quantity**: Mass production usually reduces the unit price because fixed costs (such as design fees and mold fees) can be spread out.
#### 5. **Installation and Maintenance**
– **Installation Difficulty**: Installation at heights or in complex environments (such as underwater or high-temperature conditions) may increase costs.
– **Maintenance Services**: If regular maintenance or remote monitoring (such as for electronic signs) is required, additional fees may apply.
#### 6. **Additional Features**
– **Intelligent Functions**: Such as embedded sensors, LED lights, touch screens, etc., will increase costs.
– **Special Requirements**: Such as waterproof, fireproof, anti-corrosion and other special performance requirements.
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### **Charging Model**
1. **Project-based Pricing**
– This is suitable for large or complex custom sign projects. Designers and manufacturers will provide an overall quote based on project requirements.
2. **Charging by Area**
– Applicable to flat signs, such as billboards and wall signs, etc., the cost is usually calculated per square meter.
3. **Per-piece Pricing**
– Applicable to small signs or batch production, such as doorplates, direction signs, etc.
4. **Design Fee + Production Fee**
– The design fee and production fee are calculated separately. The design fee is usually charged by the hour or per project, while the production fee is calculated based on materials and craftsmanship.
5. **Additional Service Fees**
– These include installation fees, transportation fees, maintenance fees, etc., and are usually quoted separately based on actual needs.
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### **Examples of Price Ranges**
The following are the approximate price ranges for some common custom signboards (for reference only; actual prices may vary by region and supplier):
1. **Simple Door Signs**: 50 – 200 yuan per piece (Materials: Acrylic, Metal).
2. **Outdoor Advertising Boards**: 500 – 2000 yuan per square meter (Materials: Printed fabric, LED).
3. **Electronic Signboards**: 1000 – 5000 yuan per square meter (Material: LED display).
4. **High-End Custom Signboards**: Over 5000 yuan (Materials: Stainless steel, Copper; Processes: Engraving, Electroplating).
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### **Summary**
The charging standards and principles in the custom sign industry vary depending on project requirements. When choosing a supplier, customers should comprehensively consider factors such as design, materials, craftsmanship, and installation. At the same time, selecting an experienced supplier can ensure the quality and compliance of the signs and prevent potential issues in the future.

The supply chain of the sign and plaque industry involves multiple links, from raw material supply to the final product delivery, covering several stages such as design, production, logistics, and installation. The following are the main links in the supply chain of the sign and plaque industry and their key points:
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### 1. **Raw Material Supply**
– **Key Materials**:
– **Metal Materials**: Such as stainless steel, aluminum plates, copper plates, etc., used for making high-end signboards.
– **Plastic Materials**: Such as acrylic, PVC, PC, etc., used for making lightweight and durable signboards.
– **Wood**: Used for making retro or natural style signboards.
– **Luminous Materials**: Such as LED lights, phosphor, etc., used for making luminous signboards.
– **Coatings and Inks**: Used for surface treatment and printing.
– **Supplier Management**:
– Ensure the quality, price, and delivery time of raw materials.
– Establish long-term cooperative relationships to guarantee the stability of the supply chain.
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### 2. **Design and R&D**
– **Design Software and Tools**:
– Use design software such as CAD, AI, and PS for signboard design.
– Provide customized design solutions based on customer needs.
– **Innovation and R&D**:
– Develop new materials and processes to enhance product competitiveness.
– Optimize the design process by integrating intelligent technologies such as AR/VR.
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### 3. **Production and Manufacturing**
– **Production Processes**:
– **Cutting and Engraving**: Precise processing is carried out using equipment such as laser cutters and CNC engraving machines.
– **Printing and Painting**: Patterns and text are created using technologies like UV printing and screen printing.
– **Assembly and Welding**: Different components are assembled into complete signboards.
– **Surface Treatment**: Processes such as polishing, electroplating, and painting are applied to enhance the appearance quality.
– **Production Equipment**:
– Laser cutters, engraving machines, UV printers, welding equipment, etc.
– **Quality Control**:
– Strict quality inspections are conducted during the production process to ensure that products meet standards.
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Customized Engraved Office Sign,Business Name Sign,bronze signs plaques,Door Number Sign,hotel Signs,Metal Letters,Copper Portrait Sculpture

### 4. **Logistics and Warehousing**
– **Logistics Management**:
– Select appropriate logistics companies to ensure the safe and timely delivery of products.
– Provide professional packaging and transportation services for large or fragile signboards.
– **Warehousing Management**:
– Plan the storage of raw materials and finished products rationally to reduce inventory costs.
– Use information systems (such as WMS) to enhance warehousing efficiency.
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### 5. **Installation and Construction**
– **Site Survey**:
– Confirm the installation location, environmental conditions, and customer requirements.
– **Installation Team**:
– Provide professional installation services to ensure that the signboards are firm and aesthetically pleasing.
– **Construction Equipment**:
– Use equipment such as aerial work platforms, electric drills, and welding equipment to complete the installation.
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### 6. **After-sales Service**
– **Maintenance and Care**:
– Provide regular maintenance services to extend the service life of the signboards.
– **Problem Resolution**:
– Offer timely repair or replacement services for damaged or defective signboards.
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### 7. **Informationization and Intelligence**
– **Supply Chain Management System**:
– Optimize supply chain management by using systems such as ERP and SCM to enhance efficiency.
– **Data Analysis**:
– Optimize inventory, production, and logistics through data analysis.
– **Intelligent Technologies**:
– Integrate AI, IoT, and other technologies to achieve intelligent supply chain management.
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### 8. **Environmental Protection and Sustainable Development**
– **Green Materials**:
– Select environmentally friendly materials to minimize the impact on the environment.
– **Waste Recycling**:
– Recycle waste generated during the production process to reduce waste.
– **Energy-efficient Production**:
– Adopt energy-efficient equipment and technologies to reduce energy consumption.
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### Suggestions for Supply Chain Optimization
1. **Digital Management**: Introduce information systems to achieve data sharing and collaboration across all supply chain links.
2. **Supplier Partnership**: Establish long-term cooperative relationships with high-quality suppliers to ensure the quality and stability of raw material supply.
3. **Inventory Optimization**: Use data analysis to rationally control inventory and reduce capital occupation.
4. **Intelligent Upgrade**: Combine AI, IoT and other technologies to enhance the intelligence level of the supply chain.
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By optimizing supply chain management, signboard enterprises can enhance production efficiency, reduce costs, and improve customer satisfaction, thereby gaining an edge in market competition.

AI is an artificial intelligence technology that can be integrated with the sign industry in various ways to promote its intelligence, digitalization, and efficiency. The following are several potential directions for the integration of DeepSeek technology with the sign industry:

### 1. **Intelligent Design and Optimization**
– **AI-Assisted Design**: By leveraging DeepSeek’s AI technology, we develop intelligent design tools to assist designers in quickly generating signboard design proposals. By inputting requirements such as size, material, and style, the AI can automatically generate multiple design options for customers to choose from.
– **Personalized Customization**: Based on customer demand data, the AI can recommend personalized design elements (such as colors, fonts, and patterns), enhancing design efficiency.
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### 2. **Intelligent Production and Process Optimization**
– **Automated Production**: By integrating AI and machine learning technologies, the production process of signboards is optimized, enabling automated cutting, engraving, printing, and other processes. This reduces labor costs and enhances production efficiency.
– **Quality Inspection**: Computer vision technology is employed to conduct real-time quality inspection of signboards during the production process, ensuring that the finished products meet the standards.

### 3. **Smart Installation and Maintenance**
– **AR-Assisted Installation**: By leveraging augmented reality (AR) technology, visual guidance is provided to installers to ensure the accuracy of the installation position and angle of the signboards.
– **Intelligent Maintenance Alerts**: Utilizing Internet of Things (IoT) and AI technologies, the status of the signboards (such as damage, fading, etc.) is monitored, and automatic alerts for maintenance or replacement are issued.
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### 4. **Data Analysis and Market Insights**
– **Customer Demand Analysis**: By analyzing customers’ historical orders and preference data, AI can predict market demands, helping enterprises optimize their products and services.
– **Industry Trend Forecasting**: Utilizing big data analysis, it provides signboard enterprises with industry trend and competitive analysis, assisting them in formulating strategies.
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### 5. **Intelligent Marketing and Customer Service**
– **Intelligent Customer Service**: By leveraging DeepSeek’s natural language processing (NLP) technology, an intelligent customer service system is developed to provide 24/7 consultation services to customers, addressing questions related to sign design, production, and installation.
– **Precision Marketing**: Through AI analysis of customer data, precision marketing is achieved, recommending suitable sign products and services to potential customers.
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### 6. **Environmental Protection and Sustainable Development**
– **Material Optimization Suggestions**: AI can analyze the environmental performance of different materials, helping enterprises choose more eco-friendly materials and promoting sustainable development.
– **Waste Management**: By optimizing production processes through AI, material waste can be reduced and production costs lowered.
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### 7. **Virtual Display and Experience**
– **Virtual Reality (VR) Display**: Utilizing VR technology, we offer customers a virtual display experience of signboards, allowing them to view the actual effect of the signboards in a virtual environment.
– **Online Customization Platform**: Develop an AI-based online customization platform where customers can adjust design parameters in real time and view the results, enhancing the user experience.
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### 8. **Industry Training and Knowledge Sharing**
– **AI Training System**: Provide an AI-driven training system for professionals in the signboard industry to help them master the latest design, production, and management technologies.
– **Knowledge Base Construction**: Utilize AI technology to build an industry knowledge base, enabling enterprises to quickly access relevant technical and market information.
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### Summary
DeepSeek’s AI technology can bring about a full-process intelligent upgrade for the signboard industry, from design, production to installation and maintenance, helping enterprises enhance efficiency, reduce costs, and improve customer experience. At the same time, it promotes the digital transformation and sustainable development of the industry. If you have specific needs or scenarios, we can further discuss how to customize and integrate DeepSeek’s technology.

The full name of Shengyi Long Company is “Beijing Shengyi Long International Sign Engineering Co., Ltd.” It has the qualification of an operator of foreign trade issued by the state and has opened a foreign exchange account.
In the Chinese mainland, we have provided processing and services for the real estate, scenic spots, hotels, medical care and other industries in many regions.
We have also cooperated with clients from the United States, the United Kingdom, Germany, Kazakhstan, Japan, Kenya, Australia, Taiwan and other regions.