Fourteen people have survived the disaster, and so far 77 people have been confirmed dead, according to CCTV. There were 456 passengers on the ship and Guan was one of more than 200 divers deployed to find survivors.
Guan rescued two survivors on Tuesday, both of whom were trapped in air pockets inside the boat.
According to the BBC, Guan first found a 65-year old woman stuck in an air pocket, taught her how to use the diving equipment and took her to the surface. Then he found a crew member stuck in another air pocket, to whom he gave his own equipment to help him reach the surface.
Guan almost died in the process, as he was swept deeper by undercurrents and the oxygen in his tank running low. "There were engine oil in his ears and noses and his eyes were reddened," People's Daily said.
The story that Vista posted on Weibo about Guan received about 200,000 responses in a day.
The state-run People’s Daily newspaper also posted about Guan on Weibo.
His story was also shown on government-owned CCTV.
Although Guan's story has been all over the media, including government-owned publications, the Chinese government has been accused of limiting access to information about the accident by giving out special press card to journalists and setting up police roadblocks.