BEIJING: Mary Meng is so busy and stressed working for a Chinese tech company in Shanghai that she can't imagine having a second child. "The work pressure is such that you don't even have any time to spend with your child," said the 37-year-old mother of a primary school-aged boy. "How can I think about taking care of two children? I have no idea." That resonates with urban residents anywhere. But given the pace of population decline and ageing in China , the impact of the fast-paced, expensive