Li Zhanguo’s two children, ages 4 and 8, don’t have their own smartphones, but like millions of other Chinese children, they are no strangers to online gaming. “If my children get their hands on our mobile phones or an iPad, and if we don’t closely monitor their screen time, they can play online games for as long as three to four hours each time,” he said. Not anymore. Like many other parents, Li is happy with new government restrictions that limit children to just three hours weekly of online gaming time – an hour between 8 p.m. and 9 p.m….