First of all, I can definitely answer you that the phenomenon you see is normal, and children abroad are generally precocious than those at home. There are two more important reasons for this result.

First, foreigners don't expect their children to provide for the elderly, so they don't have to worry about their children from birth to before they leave, as in China. Their obligation is only to raise their children, but they don't care much about what happens after they are raised. They respect openness and are more supportive, while China respects care.

Second, when 10 was in his teens, foreign countries began to gradually reduce children's tolerance for family and encourage them to experience it themselves. Only when they have experienced more things in a short time can they adapt to society more quickly. In China, everything is under strict supervision until children graduate from college.