It was a bizarre way for the Frenchman to lose the jersey which he had kept for three days after winning the stage two.
The win meant Qingdao continue to lead the overall standings, although second-placed Ruichang Biyuan also cruised to a victory, beating second from the bottom team Anhui Souyu 4-1 later in the day.
Valter, 22, broke free during the final few kilometers and the peloton was unable to catch him.
Garcia looked untouchable in the first set and for much of the second, blasting 30 winners and breaking Pliskova's serve three times en route to the 6-1, 7-6 (2) victory.
Fiorentina loanee Pedro put the visitors ahead in just the second minute by pouncing on an errant pass and sliding home from close range.
In the 65th minute, Dalian's Ke Zhao added a goal of his own and sealed the 4-0 victory.
DALIAN, China, Sept. 3 (Xinhua) -- Former Italian international Eder scored the winner to help Jiangsu Suning beat Shangdong Luneng 1-0 in a Chinese Super League tie on Thursday.
DALIAN, China, Sept. 3 (Xinhua) -- Salomon Rondon contributed one goal and two assists as Dalian Professional crushed Henan Jianye 4-0 in the ninth round of the Chinese Super League here on Thursday.
Duan Liuyu sent a long-distance shot off the cross-bar in the 45th minute, while Marouane Fellaini saw his header hit the post in frustration in the 61st minute. Enditem
"It's top players, so if you wait for the mistake it's never going to happen," Garcia said. "If you let Pliskova breeze and take your serve, you're never going to make a return, and then it's 6-4, 6-4 and you're done in one hour."
Marouane Fellaini (R) of Shandong Luneng vies with Wu Xi of Jiangsu Suning during the 9th round match between Shandong Luneng and Jiangsu Suning at the postponed 2020 season Chinese Football Association Super League (CSL) Dalian Division in Dalian, northeast China's Liaoning Province, Sept. 3, 2020. (Xinhua/Pan Yulong)