SUN SANG CHEMICALS PROCESSING CO., LTD. and XIN SHENG ZAN JI PLASTIC MATERIALS (HUIZHOU) CO., LTD. were formally established in 1980. The founder of our company, Mr. Ho Chan Kai, first recycles polystyrene to produce recycled polystyrene pellets, which are then supplied to manufacturers of audio tapes or video tapes. However, with the progress of different generations and changes in life, the demand for audio tapes and video tapes has also decreased relatively. However, it was gradually replaced by CD, VCD and DVD. This also leads us to the era of engineering plastics.

Mr. Ho Chan Kai, the chairman of the company, was elected as the chairman of the Hong Kong Plastic Recycled Raw Materials Association by members of the Hong Kong waste plastic industry in 1997. The main purpose is to assist Hong Kong's waste plastic merchants in communicating with the central government about the correct methods of handling available recycled plastics. Through years of close ties with the central government, Mr. Ho Chan-kai has become the main bridge between Hong Kong waste plastic merchants and the central government.