Chen Ruishen, an expert in tumor treatment in South China's Guangdong Province, is experienced in treating lung liver, breast and esophagus cancer.

He has been studying about lung cancer for over 20 years and based on traditional Chinese medicine (TCM) theories, he developed Xianyu Soup, which can help clear the lungs and reduce phlegm.

Throughout the years, using the soup, accompanied by other therapies that are designed according to patients' situations, has treated more than 600 people.

Chen is now doing research in cancer treatment by using a combination of TCM and western medicine.

Chen graduated from the Guangzhou University of Traditional Chinese Medicine and is now a professor at the university and chief doctor of the tumor department at the university's first affiliated hospital.