G an Zhongru is a Chinese billionaire businesswoman whose fortune is derived from her significant stake in Haitian International Holdings, a major global manufacturer of plastic injection molding machines. She is the wife of Zhang Jingzhang, one of the company's founders. The company has become a dominant force in its industrial niche.

Haitian International is one of the world's largest producers of the machines that are used to manufacture a vast array of plastic products, from car parts to consumer electronics casings. The company has grown by serving the immense demand from China's manufacturing sector and has also expanded its sales globally. Gan's wealth is a reflection of her family's ownership of this powerful and highly successful industrial machinery company, which is listed on the Hong Kong Stock Exchange.