Works painted by autistic people are sold via Tencent's charitable platform, Aug 29, 2017. [Photo/IC]

Altogether, 36 works of art were available from artists 11 to 37 years old, and buyers could save a digital copy.

The project began on Aug 17 but discussion heated up in earnest on Tuesday on WeChat, a major social media platform. WeChat is owned by Tencent.

Donations since the project began totaled more than 15 million yuan. About 5.8 million people participated.

By noon on Tuesday, 2 million people had participated and donated 8.4 million yuan. But the donation page was closed at 4 pm after the target of 15 million yuan was reached.