Guangzhou got their Asian Champions League Group H campaign off to the perfect start with a 5-1 hammering of last season's beaten finalists Jeonbuk.
The Chinese visitors were 2-0 ahead by the interval thanks to strikes from Cleo (28) and Dario Conca (42). Cleo then added a third in the 71st minute before Jung Shung-Hoon replied a minute later for Jeonbuk.
But Conca's second goal after 74 minutes put the match beyond the South Koreans with Luiz Muriqui completing the rout two minutes later.
Jirawat Makarom scored the winner as Buriram edged out Kashiwa Reysol 3-2 in the same group.
Makarom had given the Thai club an 11th-minute lead and Asqar Jadigerov added another seven minutes before the break. Kashiwa rallied in the second half and goals from Junya Tanaka (54) and Hiroki Sakai (61) brought the Japanese side back into contention, but Makarom had the final say 14 minutes from time.
A last-minute goal from Alves Heverton earned Seongnam Chunma a 2-2 draw at Nagoya Grampus in Group G.
Heverton hit the visitors' opener two minutes after the break, but a 58th-minute penalty from Joshua Kennedy brought Nagoya level. Mu Kanazaki then fired the Japanese side in front after 73 minutes but they were denied an opening win by Heverton's late heroics.
In the same group, Tianjin Taida and Central Coast Mariners played out a goalless draw.
Al Jazira came from two goals down to beat Nasaf 4-2 in a Group A match which had been put back 24 hours due to snow in Uzbekistan. Nasaf took just two minutes to take the lead through Fozil Musaev with a Rubaiya Sami own goal doubling the advantage 10 minutes later.
But Jumaa Abdullah's effort six minutes before the break sparked Al Jazira's comeback and they were on level terms through Abdulla Mousa after 68 minutes. Jader Bari then gave the visitors a 76th-minute lead before Ricardo Oliveira rounded off the scoring two minutes from time.
In Group C, Qatari outfit Lekhwiya posted a 1-0 win over Al-Ahly of Egypt thanks to Nam Tae-hee's 75th-minute goal, while Iranian side Sepahan won by the same scoreline against Al-Nasr of UAE courtesy of Bruno Correa's goal in the 85th minute.
In Group D, Saudi club Al Hilal survived the 40th-minute dismissal of Osama Hawsawi to post a 1-1 draw with Perspolis of Iran. Ali Karimi fired the Iranians ahead from the penalty spot after 42 minutes but Al Hilal drew level through Mohammad Al-Shalhoub after 53 minutes.
The other Group D encounter between Al-Shabab of Saudi Arabia and Qatar's Al Gharafa ended goalless.