SHANGHAI — In China, teenagers can purchase a fake ID online for as little as $2. Is it for buying booze? Subverting the state? Many simply want to play a game on their phones.

More than 200 million people in China play Honor of Kings, the social media-focused app that has become the biggest moneymaking smartphone game in the world. On Wednesday, its creator, the Chinese internet conglomerate Tencent Holdings, said that Honor of Kings helped power a nearly 40 percent rise in its game revenue in the three months that ended in June.

But the game’s popularity among the young has alarmed Chinese officials. In response, Tencent has added restrictions that limit those under age 12 to an hour of play a day, and those between 12 and 18 to two hours a day.

As savvy Chinese internet users have done for years, many players have found workarounds.

One is Min Jingxi, a 17-year-old student. She plays the game as many as five or six hours a day during her summer vacation — often as a character named Wang Zhaojun, a famous beauty from Chinese history — thanks to a fake identity she has established online.