Chinanews, Mar. 7 - To be always in a good mood is crucial to one’s health, because the human body will suffer a 20% decline in the anti-tumour ability of the cells in the body if one is in a bad mood, said Zhong Nanshan, president of Chinese Medical Association, member of Chinese Academy of Engineering, at a health lecture to white-collar employees and entrepreneurs in Guangzhou.Zhong believes that one who wishes to remain healthy should pay attention to five important points: keep a balanced state of mind, regulated diet, do physical exercise as appropriate, ensure early diagnosis and early treatment, and stay away from cigarettes and alcohol, Of the five, mental health should be given more attention.To achieve a balanced state of mind, one should be content with what one has ， remain happy in face of adversity, and treat others with generosity, said Zhong Nanshan.