Our products and customized service cover a wide range of industries, including
Auto/automobile/automotive parts, car parts, truck/lorry parts, commercial vehicle parts, forklift/ lifting equipment parts, combine harvester parts, farm/agricultural machinery parts, mining machinry parts, engineering machinery parts, construction machinery parts(crane/hoist, excavator parts, bulldozer parts, dump/dumper/self-dumping/self-discharging truck parts, mixer truck parts, pump truck, crusher...), petroleum/oil production machinery parts, shipbuilding machinery parts, bullet train parts, high-speed railway parts, underground/subway/metro parts, tractor parts, trailer parts, industrial equipment parts, marine/ship machinery parts(Turbine, propeller...), defense equipment parts(tank, armoured troop carrier, amphibious equipment...), power plant components, wind power generator/tower parts, lift/elevator parts, medical equipment parts, food machinery parts, aviation equipment/instrumentation parts, pump parts, valve parts, gearbox parts, motor/engine parts, motorcycle parts, Lathe Machine tool parts, etc.

Each of our products is a work of art.
Our mission: Commited to offer high quality products with competitive price and excellent service worldwide.
China auto giants FAW/FOTON/SINOTRUK/HOWO/SHACMAN designated supplier for customized auto parts.
Our factory combines design, research, development, casting, forging, CNC machining, surface treatment and inspection all together.
A LEADER in the precision casting industry, can solve and handle special material, special structure, special defect and special processing, meet the evolving needs of, and provide optimal solution and real one-stop service to, global customers.
One of major suppliers of customized parts for automotive manufacturers spreaded all over the world.
Leverage our first-mover advantage in this field to support global low-carbon economic development.
A senior engineering technical team with special skills and rich experience in product design, casting, forging, and CNC machining fields, can solve and handle special material, special structure, special defect and special processing, meet the evolving needs of, and provide optimal solution and real one-stop service to, our customers.
Large casting items for heavy truck/equipment/machinery. 
We can produce any kind of castings with high precision CNC machining according to customer's drawings/samples/requirements.
A leading foundry manufacturer specializing in the design, research, development and production in the foundry industry for more than 40 years, with 60 experienced technical engineers and 800 skilled workers.
Our factory covers an area of more than 90,000 square meters, with precision casting production lines, the processing technology of the casting production lines is mainly divided into sand casting, investment casting and die casting.
The most advanced CNC machining center, which is composed of dozens of state-of-the-art three axis, four axis, and five axis CNC machine tools. 
We have more than 400 sets of casting/forging/machining equipments in total, including 60 sets of three/four/five-axis machining center (CNC) and 2 sets of digital special machines designed with double main axle boxes.
The castings produced by us are widely used in various industries, such as auto, car, truck, tractor, trailer, combine Harvester, forklift, motorcycle, military vehicle, special vehicle, industrial equipment hardware, defense armament, bullet train; high-speed railway, construction machinery/truck/vehicle/equipment, mining machinery/truck/vehicle/equipment, commercial vehicle, marine/ship machinery parts, excavator, cement/concret mixer truck, bulldozer, boat, farm/agricultural machinery, shipbuilding, petroleum machinery, valve, pumps, gearbox, electric machine, lathe machine, machinery, power/energy/industry hardware/equipment, engineering installation, food equipment, artificial intellegence, medical instrument, aerospace facility, and other mechanical equipments.
Packaging workshop. 
We can produce all kinds of castings with high precision CNC machining according to customer's drawings/samples/requirements. 
A senior engineering technical team with special skills and rich experience in product design, casting, forging and machining fields, possessing special technology and skill to solve and handle special material, special structure, special defect and special processing. 
Warehouse.
Our factory possess complete sets of production lines, the whole production chain- from raw materials to finished products-are under our control, which enable us constantly, stably to offer high quality products with competitive prices and excellent service worldwide.
Abundant technical forces and sound production management system, superior production equipments, strict and effective quality control system, advanced and excellent inspection instruments&means, to ensure us constantly, stably to provide high-quality products for global customers.
First-class equipments significantly improve production efficiency and product quality, and ensure quality standards are met.
Based on customer needs, in the beginning of product development, offer a solution, products design, by structural component designed to casting parts, optimize product design, reduce costs and creating more value for customers.
A strict product quality monitoring system and effective quality assurance system, excellent and perfect detection means, to ensure the quality of our products in control. 
Design software and DEFORM Simulation Software-Auto CAD, solid works, UG, Pro/E, CAXA, Proe, Rhino, Catia, Simio, Alias, Arena-are being used by our R&D staffs during design proess of new products.
Each batch of products from raw materials to finished products will be tested in the laboratory to ensure that the quality meets the contract requirements. Each batch of finished products will be carried out spectral inspection. For specific products tensile test will be conducted to ensure that the tensile strength of products is up to the standards.

We are familiar with various industrial standards, such as Chinese GB, American ASTM, AISI , German DIN, French NF, Japanese JIS, British BS, Australian AS and Association of American Railroads (AAR ) and other industrial standards. Most of our products are for export and mainly export to Europe and America, so we know the technical standard of Europe and America very well.

Established in 1980, Sino Industry and Trade Co., Ltd. (hereinafter referred to "SITC") is a leading foundry manufacturer specializing in the design, research, development and manufacture in the foundry industry. Being one of major suppliers of customized hardware parts for automotive manufacturers spreaded all over the world, the company is commited to offer high quality products with competitive prices and excellent service worldwide.

Headquartered in Rizhao City, Shandong Province, P.R. China, the company wholly owns a subsidiary production factory named "Rizhao Longshan Pricision Machinery Manufacture Co., Ltd.", which covers an area of more than 90,000 square meters, with precision casting production lines, and the most advanced CNC machining center which is composed of dozens of state-of-the-art three axis, four axis, and five axis CNC machine tools. The processing technology of the casting production lines is mainly divided into sand casting, investment casting and die casting. Abundant technical forces and sound production management system, superior production equipments, strict and effective quality control system, advanced and excellent inspection instruments&means, to ensure us constantly, stably to provide high-quality products for global customers.

More than 40 years experience in precision casting industry, with 60 experienced technical engineers and 800 skilled workers, SITC has a senior engineering technical team with special skills and rich experience in product design, casting, forging, and CNC machining fields, can solve and handle special material, special structure, special defect and special processing, meet the evolving needs of, and provide optimal solution and real one-stop service to, our customers.

1* Mature one-stop service system
We provide real one-stop service and optimal solution for customers
(1)we are one source manufacturer, not a intermediary trader.
(2)We have our own technology department to solve all-round problems related to product technology.
(3)We have complete production lines, all production links from raw materials to finished products are under our control.
(4)We have a strict product quality monitoring system and an effective quality assurance system to ensure the quality of our products in control.

2* Modern machinery and patented equipment
We have more than 30 kinds of mechanical equipments related to casting, grinding, processing, surface treatment, etc., more than 400 sets in total, including the most advanced CNC machining center which is composed of 60 sets of three-axis, four-axis and five-axis CNC machine tools, as well as 2 sets of digital special machines designed with double main axle boxes. Our equipment has significantly improved production efficiency and product quality.

3* Sufficient production capacity
We supply more than 110000 tons of goods to more than 12 clients in 2022. Under the supervision of the ISO9001 International Quality Management System, we not only ensure sufficient supply capacity, but also assure customers of punctual delivery.

4* Modern laboratory
Each batch of products from raw materials to finished products will be tested in the laboratory to ensure that the quality meets the contract requirements. Each batch of finished products will be carried out spectral inspection. For specific products tensile test will be conducted to ensure that the tensile strength of products is up to the standards.

5* Wide application of products
The castings produced by us are widely used in various industries,such as construction vehicles, trains, railways, forklifts, agricultural machinery and other mechanical equipment. We can produce all kinds of castings with high precision CNC machining according to customer's drawings/sample/requirements.

6* Strict product information tracking
Each of finished products will be assigned one unique identification, especially for those made from different batches of raw materials will be recorded and archived with raw material batch number and factory production code to facilitate tracing in case of quality discrepancy or any disagreement on the quality.