The Shanghai Government plans to crack down on migrant workers who violate China's strict population-control policy, and is seeking better tools to track and monitor the 'floating populace'. Wei Longgeng, spokesman for the Shanghai Population and Family Planning Commission, said: 'The city is revising the [local population-control] regulation to bring it in line with the new national law.' Mr Wei was referring to China's new family planning law, which became effective in September. He told the official Shanghai Daily that 'the important thing is how to control the movement of the migrant population and the unplanned births among them. In the new regulation, more detailed rules and management measures will be issued'. China's two-decade-old market reforms have given rise to a surplus army of rural labourers numbering more than 100 million, and millions have converged on wealthy Shanghai to find jobs in construction, house-keeping and other low-paying sectors. The workers' mobility, while contributing to Shanghai's economy, has also made it hard for the Government to keep track of births. While trying to solve the problem, the city will also partially ease regulations that currently punish residents who violate the one-child rule and that stigmatise for a lifetime children born outside the system. 'Kids are innocent when they are born, and they should not be punished for a lifetime for the population-control violations committed by their parents,' said He Tifeng, an official at Shanghai's Population and Family Planning Commission. Mr He said parents who were both only children or who gave birth to a first child that was handicapped might avert the brunt of current rules by paying a 100,000 yuan (HK$93,000) 'social expenditure' fee to have some of the punishments for having a second child lifted. For urban couples the punishments can include having welfare and medical benefits cut.