"Love between kids and parents, couples, siblings and cousins are all essentials to ones upbringing," said Ye. "Yet, children now in our country may not even be blessed to have cousins, which is a serious handicap to their nature and may lead to personality flaws."

The first generation under the one-child policy is now at the right age for marriage.

Besides, in the eyes of sociologists, a family frame composed of four grandparents, two parents and one child is not a rational option and may be an unbearable burden for a couple as it is both costly to get a child admitted to schools and to take the elderly to see a doctor, Ye added.

The government has just announced this month that it will step up efforts to monitor celebrities and the rich that have more children than the state family planning policy allows.

In Shanghai, couples are allowed to have two kids if both are the only child in their family.

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