Shenhua now ranks fourth with 18 points in Group A, and a victory in the last round will send it to the Final Group A of next stage, while R&F is certain to drop into the Final Group B. Enditem
Leverkusen had the last chance on target but substitute and new arrival Patrik Schick was unable to beat Casteels with a header with seven minutes to the final whistle.
The South American zone World Cup qualifiers were originally scheduled to begin in late March but were suspended because of the COVID-19 pandemic.
The outbreak follows Flamengo's week-long trip to Ecuador for a Copa Libertadores double-header against Independiente del Valle and Barcelona SC.
More than 250 athletes descended on the Romanian city for two days of action. Mardare, the bronze medallist at the 2016 Balkan Championships, achieved an impressive 82.78m with his second attempt.
"We have very encouraging news about the development of vaccines," he said, adding that experts they talked to have "unanimously" agreed that vaccines will be available at the beginning of next year and in "considerable" doses.
In light of these developments, and recent enthusiasm for skiing in China, Xinhuanet talked exclusively to Chinese amateur skiers, to know more about why they fell in love with skiing and get their perspective on the growth of the sport.
With the result, Hertha Berlin suffered its first defeat whereas Eintracht Frankfurt took its first win of the season.
Guangzhou still ranks first in the group, and will take on Dalian Pro in the group's last round.
Jiangsu and Guangzhou staged a hard-fought game with constant clashes. Alex Teixeira opened the scoring for Jiangsu in the remaining minutes of the first half. After He Chao pulled one back for Guangzhou in the 71st minute, Eder Citadin Martins gave Jiangsu the lead again four minutes later.
Guangzhou regrouped after the interval and levelled in the 71st minute when Wu Chao slotted the ball into the net after collecting a pass from his teammate in the box.