By Phoebe Zhang
China has expanded the probe into a kindergarten lead poisoning scandal that has shocked the nation, with the central government getting involved in a rare intervention in a provincial investigation.
On Saturday night the authorities in Gansu said the investigation would be led by provincial leaders working alongside a task force from the State Council, the country鈥檚 cabinet.
Last week, Chinese media reported that 233 of 251 children at the kindergarten in Tianshui, a second-tier city in the…