What's the difference between Foshan Shang Qing and Kaifeng Shang Qing?

There is no difference. Foshan Shang Qing and Kaifeng Qingshangdu are factories of Taiwan-funded enterprise Shang Qing Chemical Co., Ltd.. Shang Qing Chemical Group has invested and established factories in more than ten provinces and cities in China, including Shanghai, Tianjin, Qingdao, Guangzhou, Foshan, Xiamen, Huizhou, Zhuzhou, Chengdu, Kunming and Zunyi.