Tianjin coach Liu Hao admitted as a young team, his side have a gap to Shanghai in terms of skill.
The "Bulls" assumed control from the starting whistle and pressed the "Royal Blues" onto the back foot.
The host squandered a promising chance after Axel Witsel failed to make the most out of Reyna's cutback pass into the penalty area.
Two-time Grand Slam winner Kvitova had to bounce back from 1-5 down in the opening set against Canada's teenager Leylah Fernandez to set round-of-16 clash with Zhang.
"In the second set and the third set, I had a lot of opportunities, also easy opportunities," said Schwartzman after his 20th victory of 2020. "That's why I was really upset, really angry with myself at that time ... when I was close to winning in those sets. I couldn't do it."
Beijing closed the first quarter on a 17-4 run, going up 33-17 as the quarter time ran out.
With the support of the Chinese Table Tennis Association (CTTA), international table tennis action is back after several months of activity suspension due to the COVID-19 pandemic.
"We didn't handle some big shots well due to a lack of experience," admitted Wuhan coach Li Xin. Enditem
"I mean, we both gave everything," said the third-seeded Thiem. "The thing in tennis is that there is one loser, one winner. Despite (being) so disappointed, I'm still happy for him."
Next up for Halep is another 19-year-old youngster, Iga Swiatek of Poland, whom Halep defeated in the round of 16 here last year.
The 30-year-old, who has been capped once for Argentina's national team, has struggled for opportunities since joining Boca from Mexico's Cruz Azul in January 2019.