Valter, 22, broke free during the final few kilometers and the peloton was unable to catch him.
The result lifted Flamengo to fifth in the 20-team standings, five points behind leaders Internacional
"I was looking to take the jersey on stage six anyway so I'll go in with the same tactic - try to win the stage and see what happens."
The 33-year-old striker, who came on after the interval, latched onto a through pass from teammate Wu Xi before sending it into the net in the 65th minute.
With this result, Dalian are sixth in Group A with nine points, while Henan with six points remained in last place. Enditem
"Our original partnership was mainly focused on the World Cup in China. We are thrilled that this has now expanded to be a more all-encompassing partnership across all FIBA competitions."
Rondon continued to demonstrate his prowess in the second half. In the 48th minute, the Venezuelan striker assisted Swedish winger Sam Larsson to stretch the lead for Dalian.
Before the game, Dalian ranked seventh with six points in the eight-team division in northeastern China's Dalian city, while Henan, also on six points, sat at the bottom by virtue of their inferior goal difference.
"It was anybody's game really for a set and a half. I made some breaks and then obviously after winning the second set I felt more comfortable. I was returning better, I started to read his serve better, and I was pleased with my serve. Overall, it was a very good test, and I am happy to get through," said Djokovic, who is bidding to capture his fourth US Open trophy and 18th Grand Slam title.
"Our development will not be redirected. It is just a strategic adjustment based on reality. We will continue to hand the best services to our fans and partners," it added. Enditem
"It was a heavy finish. It was maybe the most easy stage I ever did in a cycling race because there was no breakaway, not a high pace at all, but then the last hour was really hectic with the wind," Van Aert said.