Xiao Zhen was aroused and then electroshocked in a treatment recommended by Baidu.
A court in Beijing will decide in the next few days whether to proceed with the lawsuit against Baidu and Chongqing-based Xin Yu Piao Xiang (XYPX).
Baidu, the fifth most frequently website in the world, has broken various laws for displaying advertisements by XYPX with false claims about changing sexual orientation, according to volunteer lawyer Huang Yizhi.
Last August, the gay man, who goes by the name of ‘Xiao Zhen’, googled the terms ‘homosexuality’ and ‘gay therapy’ on Baidu and the first result he got each time was an advertisement by XYPX.
With XYPX promising to cure him of his homosexuality with a 30,000 yuan ($4880, €3525) treatment course, Xiao Zhen travelled all the way from the capital to Chongqing last month.