wish to enquire at which Italian Consular office or embassy I need to lodge my visa applicaton?

Wang Yong Xin, you should be in Guizhou Province, right? If so, you need to submit your application to the VFS Global in Beijing.

Location: Room 211-212, 2/F, No. 1 Building, (Hilong Building South Gate) Courtyard 13, Worker's Stadium North Road, Chaoyang District, Beijing.

Call +86 10 84185417 / 84185517 between 0800 - 1700 hours Monday through Friday (except Public Holidays)