Lin Yunru of Chinese Taipei, although only 21 years old, has already ranked 6th in the latest men's singles ranking released by the International Table Tennis Federation, and is also one of the fierce enemies of the national table tennis, but Lin Yunru is slim and thin, has been unable to improve in strength, is one of his Achilles heels, after the Early Exit of the Houston World Table Tennis Championships, Lin Yunru changed coaches this year, hired Olympic champion Wei Qingguang to coach, from the Doha two challenges to see that the effect is not big, the star game men's singles 1/4 final 1-3 and then lost Lin Zhongxun, The men's doubles final lost 2-3 to the German duo of Duda/Qiu Dang, and lost two defeats in one day to win 3 titles.

Lin Yunru since the Houston World Table Tennis Championships upset defeat to South Korea's Lin Jong-hoon, has not waited for the opportunity to revenge, doha star game ushered in another meeting between the two, this time Lin Yunru for Lin Zhongxun's technical and tactical characteristics have been very well understood, the opening preemptive 11-9 to win the first set, but then bigger and worse, by Lin Zhongxun won 3 consecutive sets to reverse the game, the score of 4 sets 11-9, 9-11, 5-11, 7-11, Lin Zhongxun won 2 consecutive wins between the two, enough to be called a nemesis. In this game, Lin Yunru took the initiative to pull the ball through the opponent Lin Zhongxun, in turn, Lin Zhongxun's veneer quality was higher, and the continuous attack of the "combination punch" made Lin Yunru overwhelmed.
The subsequent men's doubles final Lin Yunru and Liao Zhenju played, the opponent is Germany's Qiu Dang / Duda, from the recent international record, Duda / Qiu Dang is obviously at its peak, two consecutive stops into the semifinals, Qiu Dang is the son of Japanese coach Qiu Jianxin, in a series of competitions this year singles and doubles results are outstanding, in the German League Düsseldorf and Bohr, Carlberg same team, the strength soared, Duda is an Olympic P card player, but the recent singles results have been surpassed by Qiu Dang.
Although Lin Yunru / Liao Zhenju did not have an advantage in results, but the final battle between the two sides was still very anxious, the German combination Duda / Qiu Dang did not show much technical leadership, Lin Yunru / Liao Zhenju stubbornly dragged the game to the decider after two points behind, but unfortunately suddenly collapsed, the decider scored only 4 points, and finally lost to Qiu Dang / Duda 2-3 (7-11/11-6/6-11/11-3/4-11), so that Lin Yunru experienced 2 losses a day. Only in the mixed doubles semi-finals with Zheng Yijing defeated Szokos/Jonescu 3-0, retaining the last hope of the championship.
Lin Yunru lost to the opponent of the left hand in the men's singles match of the two stops in Doha, and lost to Yuan Licen of the national table tennis last week, which was not defeated by Lin Zhongxun this week, and when playing against the left-handed player, he often could not open the angle on the line landing point, which was not as easy as against the right-hand player, which is where he needs to focus on research and strengthening in the future. Judging from the recent achievements, Lin Yunru did not because of the arrival of the new coach, there is a performance of rapid progress in the short term, Wei Qingguang is the first table tennis Olympic champion of the Chinese team, after retiring from the national table tennis team, he joined the Japanese team and also played in many years of competition, and also worked as a coach in Japan, hoping that over time, Wei Qingguang can bring Lin Yunru more transformation, improve in technology, and gradually stabilize results.