# TianSu

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/tiansu

- Industry: Outsourcing
- Headquarters: Shenzhen, China
- Website: www.51jl.org
- Total disclosed funding: $6.1M
- Latest round: Series A (Sep 10, 2018)
- Investors on record: 1

## About

Founded in 2009 and based in Shenzhen, China, Shenzhen Tiansu Calibration and Testing Co., Ltd., trading as TianSu, is a third-party institution that provides calibration and testing service for clients. It also provides training, authentication and counseling services. In December 2025, TianSu raised CNY 600 million in an IPO, selling 16,30 million shares at CNY 36.80 per share at Shenzhen Stock Exchange, under the ticker "301449".

The company specializes in technical services such as instrument calibration, testing and certification, and training and consulting.  It currently operates two laboratories: Shenzhen Tiansu Metrology Calibration Laboratory and Shenzhen Lixun Metrology Testing Laboratory.

The company generates revenue by providing metrology, calibration, and testing services.

## Funding rounds

- Series A, Sep 10, 2018, $6.1M — Fortune Capital

## Investors

- Fortune Capital — Series A