Elsewhere, Wolfsburg and Augsburg shared the spoils after playing out a goalless stalemate. Enditem
Only four minutes later, Leipzig established a two-goal lead after Christopher Nkunku's cross into the penalty area found Angelino, who made no mistake to get his name on the scoresheet.
The 31-year-old also became the first Chinese singles player since Li Na in 2012 to reach the fourth round at Roland-Garros.
Association president Fritz Keller demanded a series of victories to collect points helping to avoid relegation "as we can't afford to go down to a lower group."
The financial impact of the pandemic on football has been apparent, the former Leipzig coach said.
The Paris Saint-Germain forward has 61 goals in 101 appearances for the Selecao, just one behind Ronaldo and 16 shy of record holder Pele.
The 2019 ATP Finals champion will face Russia's Andrey Rublev for a semifinals place in the next round. The 22-year-old Rublev recovered from a one set down and trailed by 5-2 in the second to knock out Marton Fucsovics 6-7 (4), 7-5, 6-4, 7-6 (3) in the last men's round of 16 clash.
The South American zone World Cup qualifiers had originally been scheduled to begin in late March but were suspended because of the coronavirus pandemic. Enditem
The 12th seed poured out his intense emotions on the court, yelling at himself or his coaches after wasting several chances.
"My team secured a deserved victory today. We should have scored more goals but in the end all I care for are the three points," Leipzig's head coach Julian Nagelsmann said. Enditem
Luo Xinyu bagged 18 points for Jiangsu, who also got 14 points apiece from Xu Chenyan and Jiang Jiayin.