At the same time, during the National Fitness Day, the Olympic Sports Center will hold the 2017 China International Tennis Challenge, which will have 80 athletes in more than 20 countries, with a total bonus of 150 thousand dollars, the highest level of the ATP challenge, only two in the country, and then there will be the top 50 tennis players in the world. Competition, the national hands Wu Di, Zhang Ze, Gong Maoxin will also participate in this event, the center will be in August 1st, a daily limit of the issuance of watch coupons, the specific ticket information please pay attention to the center website. National Fitness Day, the specific activities of the Ji'nan Olympic Sports Center are as follows: