Genshin Impact, one of the world’s hottest mobile video games, has all the characteristics of a Japanese invention: giant robots; human-size swords; characters with huge eyes and spiky, rainbow-colored hair; and a puzzling fixation on women in maid outfits.

There’s just one catch: It’s Chinese.

Released in late 2020, the game is the first bona fide international smash hit for China’s video game industry. In its first year on the market, it raked in $2 billion, a record for mobile games, according to Sensor Tower, a firm that monitors mobile apps. And, unlike other popular Chinese games, it is believed to have generated most of its revenue from overseas.