An aging Chinese population has made Shanghai's Population and Family Planning Commission launch a campaign to encourage eligible couples to give birth to a second child .Population officials have started to inform families about their decision about the second child policy, according to Xie Lingli, director of the commissionShanghai has about 3 million people aged 60 or older, 21.6 percent of the population," the commission director said."The rising number of retirees will put pressure on the younger generation and the social...