The Earth is online = Diqiu shangxian

An interesting dystopian SF LitRPG thriller that is a game that aliens have forced the surviving humans into, with puzzle and game format. The complication is that human nature makes cooperation problematic and unlikely, so the players are competing amongst one another for survival and prizes that will make them stronger (and therefore enable future success). Also, a large group of humans taken to an alternate universe is a opposing force that is threatening the Earth survivors as the two dimensions merge back together.

The novel is online here: https://novelfull.com/the-earth-is-online.html