Trusted by Global Buyers

With years of experience across industrial components, consumer goods, and custom OEM products, Viotech helps clients worldwide maintain consistent supply chain quality—while sourcing safely and efficiently from China.

Need Quality Assurance in China?

Viotech offers independent auditing and on-ground inspection services across major industrial regions in China. Contact us today for a free consultation or to schedule an audit.

Process Auditing

We verify supplier legitimacy and production capability through detailed auditing and quality inspection services:

Due Diligence

We investigate your supplier’s legal status, registration documents, certifications, ownership structure, and any prior compliance issues to help you avoid fraudulent or unstable partners.

Factory Audit 

We conduct professional on-site audits to verify a supplier’s production capability, facilities, equipment, workforce, and quality management systems—so you know exactly who you’re working with.

Pre-Production Inspection

Pre-Production Inspection

Before mass production begins, we inspect raw materials, components, tools, and production plans to prevent defects and ensure your order starts on the right foot.

In-Processs Inspection

We monitor production in real-time, checking the first batches and random units to catch issues early, control quality, and avoid costly delays.

Final Inspection

Final Inspection

Before goods leave the factory, we verify product quality, quantities, packaging, and compliance with your specifications—helping prevent surprises on arrival.

 Loading Inspection

We supervise the container loading process to ensure proper handling, correct quantities, and secure packaging—minimizing damage during transit.

Our Cases

A Client for 20+ Years

The consulting company I worked before introduced this US client into China market and found a local Chinese manufacturing partner to start OEM mode at the end of last century. But at the beginning the cooperation was very bumpy and the client become uneasy about the big variation in product quality which brought in risk to its 150+ year old brand. The client needed someone to watch over the production and quality of the products made at the Chinese factory. Here I came in as an independent auditor on the client’s behalf in the early 21 century.

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From Design to Ship: A Combo of 100% Custom-Made Dryers

A US food packaging company had a production expansion plan scheduled be realized in 2025. The company needed to add in many types of equipment and among them were large dryers and humidifiers, the combo. Our task was to verify and audit the Chinese manufacturer that was contracted by a trading company that the client found at Alibaba.com. The other optional source was a Malaysian manufacturer. Our finding from the audit and the pricing of the trading company made the buyer give its final choice to the Chinese factory.

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We Helped a U.S. Power Plant Get Its Custom Boiler from China Delivered On Time

A U.S. power plant in California needed a massive custom boiler from a Chinese manufacturer—a shipment so large it required 13 containers. Designed for a unique application and assembled by a U.S. engineering company, the boiler was critical for plant operations. However, when the buyer received contradictory shipping dates from the supplier, confusion set in. One week it was ready in September, the next, the new ship date was December.

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Contact Us

Contact us today for a consultation and start optimizing your sourcing process.

Company: Tianjin Viotech Co Ltd

Email: info@viotechsourcing.com

Tel: (+86) 13802148750

Address: Rm1802, Bldg 1, Huadingxinqu, 2 Haitai Chuangxinliulu, Huayuan Industry Park, Tianjin, China 300384