美国著名记者埃德加·斯诺访问陕北,在保安曾同蔡树藩和伍修权打网球。他在《西行漫记》一书中有如下描述:“球场里尽是石子,救急球是很危险的,但是球还是打得很激烈。蔡树藩和伍修权同讲不了几句中文的李德讲俄文,我同李德讲英文,同蔡、伍两人讲英文,所以这是一场三国语言的比赛。”由此可见,红军长征到陕北,把网球活动也带到了陕北。 The famous American journalist Edgar Snow visited northern Shaanxi and played tennis with Cai Shufan and Wu Xiuquan at the security guards. In his book, “Westbound Manga,” a book reads as follows: “It is dangerous to save the emergency ball but it is very fierce,” Cai Shushan and Wu Xiuquan can not speak a few words of Chinese Li Deyan I would like to speak English with Li De and English with Cai and Wu, so this is a three-language contest. "Thus, the Red Army marched north to northern Shaanxi and brought tennis activities to northern Shaanxi.