Online gamers under the age of 18 will only be allowed to play for one hour on weekends and holidays, China’s video game regulator has said. The National Press and Publication Administration told state-run news agency Xinhua that game playing would be allowed only between 8 and 9 p.m., the BBC reports. It instructed gaming companies to prevent children playing outside these times. Earlier this month, a state media outlet branded online games “spiritual opium”. Inspections of online gaming companies will also increase, to check that the time limits are being enforced, the regulator said. In related news, the hashtag loosely translated to #wtf is expected to be very popular in social media posts by Chinese teenagers in the coming days.