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.

The production of illuminated building sign letters usually involves several steps, including design, material selection, manufacturing and installation. Here is a detailed process:
### 1. Design
– **Font Selection**: Choose an appropriate font based on the brand or architectural style.
– **Size Determination**: Determine the font size based on the building’s size and viewing distance.
– **Color and Effects**: Select the luminous color and decide whether dynamic effects (such as gradient or flashing) are needed.
### 2. Material Selection
– **LED Lights**: LED lights are commonly used as the light source due to their energy efficiency, long lifespan, and high brightness.
– **Shell Materials**: Stainless steel, aluminum plates, and acrylic are frequently used. Stainless steel and aluminum plates are durable, while acrylic has good light transmittance.
– **Panel Materials**: Acrylic sheets are typically used for their uniform light transmission and variety of colors.
### 3. Production

– **Production of letter casing**: Cut, weld and grind the letter casing according to the design drawings.
– **Installation of LED lights**: Evenly install LED lights inside the letter casing to ensure uniform light distribution.
– **Production of panels**: Cut acrylic sheets and fix them onto the letter casing.
### 4. Installation
– **Fixing the brackets**: Install the brackets on the building to ensure they are stable.
– **Connecting the circuit**: Connect the illuminated letters to the power supply to ensure the circuit is safe.
– **Testing**: After installation, test the illuminated effect to ensure uniform brightness.
### 5. Maintenance
– **Regular Inspection**: Regularly inspect the circuit and LED lights, and replace damaged parts in a timely manner.
– **Cleaning and Maintenance**: Regularly clean the surface to keep it looking good.
### Precautions
– **Safety**: Ensure the installation is secure and the circuit complies with safety standards.
– **Waterproof and Dustproof**: When used outdoors, make sure to take waterproof and dustproof measures.
– **Energy Conservation and Environmental Protection**: Choose energy-saving LED lights to reduce energy consumption.
By following these steps, building sign illuminated letters that meet the requirements can be produced.

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 process of customizing signboards usually includes the following steps:
### 1. **Requirement Communication**
– **Clarify the Purpose**: Determine the purpose of the sign (such as directional signs, warning signs, advertising signs, etc.).
– **Size and Material**: Select the appropriate size and material (such as metal, acrylic, PVC, etc.) based on the installation environment and budget.
– **Design Style**: Determine the design style, color, font, etc., to ensure coordination with the brand or environment.
### 2. **Design Phase**
– **Initial Design**: The designer provides an initial plan based on the requirements.
– **Feedback and Revision**: The client offers revision suggestions, and the designer makes adjustments.
– **Design Confirmation**: The client finally confirms the design plan.
### 3. **Production Stage**
– **Material Procurement**: Purchase the required materials based on the design.
– **Production Processing**: Carry out processes such as cutting, engraving, printing, and spray painting.
– **Quality Inspection**: Ensure that the finished products meet the design requirements and quality standards.
### 4. **Installation Phase**
– **Site Survey**: Confirm the installation location and environment.
– **Installation Work**: Install according to the on-site conditions, ensuring it is secure and aesthetically pleasing.
– **Acceptance**: The customer conducts the acceptance inspection. Once confirmed to be correct, the delivery is completed.
### 5. **After-sales Service**
– **Maintenance and Care**: Provide maintenance suggestions to ensure the long-term use of the signboards.
– **Problem Resolution**: In case of quality issues, promptly offer solutions.
### Notes
– **Time Management**: Plan ahead to ensure timely completion.
– **Budget Control**: Select appropriate materials and processes within the budget.
– **Compliance**: Ensure that the signboards comply with relevant regulations and standards.
Through the above process, it can be ensured that each link from the design to the installation of the signboard is effectively controlled, and ultimately the customer’s requirements are met.