I think having two children is better than one, too. I had read news about the one-child policy in the Chinese Mainland and it reviewed that it would create a lot of social problems. For the children themselves, they should take care 6 elderly close-relatives in the future (own parents, 2 pairs of grandparents). It is also good for children development if they grow up in a family w/ more than one child, since they know how to share and communicate better.