GUANGZHOU: The provincial people's procuratorate of Guangdong has vowed to keep a "close watch" on possible cases of corruption relating to the State and province's massive investment projects this year.

Guangdong blew the lid off "413 major corruption cases" in the first quarter of this year, which is 87.3 percent of the total number of cases under investigation, Lin Junjie, a press official with the provincial procuratorate, said yesterday.

Any case involving a sum of 50,000 yuan ($7,300) is referred to as "major", Lin said.