Internet security company 360 Security Technology Inc. was listed on the Shanghai Stock Exchange Wednesday.
The company carried out a back-door listing via the SJEC Corporation, an elevator and escalator maker already listed.
Established in 2005, 360 Security Technology is one of the largest internet security companies in China.
Globally, the active users of 360's PC products average 509 million per month, and active users of mobile products totalled 1.16 billion, according to the company.
The 360 Security Technology was listed on the New York Stock Exchange in 2011. In June 2015, Zhou Hongyi, founder and chief executive officer, announced a privatization strategy and delisted the company in July 2016.
After returning to the A-share market, the company will take an active part in building China's national internet security, Zhou said.