Firm willexpose concrete problems

Zhong Jizhang likes the nickname he has been given by netizens - Mao Siye, the "Death-defying Grandpa".

"The name is meaningful," said the 68-year-old. "It makes me feel more responsible about letting the public and officials know the problems."

The veteran engineer risked his job (and some say his life) two months ago when he exposed a cover-up involving an ongoing subway network expansion in Guangzhou, capital of Guangdong province.