The 26-year-old leaves Barca after 124 first team appearances in the three years since he joined them from Portuguese giants Benfica.
In Tuesday's statement, Fedefutbol asked its government to "start conversations" to facilitate international fixtures scheduled for October and November.
Chongqing broke the deadlock in the 13th minute with a stunning goal from Brazilian forward Cirino to make it 1-0 in the first half.
"As always, your encouraging words and support meant the world to me and I look forward to getting back on the court and competing for Canada next year," the 20-year-old added.
Wolfsburg made a powerful start on home soil and caused a lot of trouble on the left wing. It took the hosts only 16 minutes to break the deadlock when Renato Steffen flicked on Admir Mehmedi's pinpoint corner, allowing Guilavogui to nod home the opener from close range.
Portu opened the scoring in the 55th minute from a tight angle after a pass from Mikel Merino, and Adnan Januzaj doubled the visitors' lead 13 minutes from time from the penalty spot after he had been clipped in the Elche area.
Aston Villa also had goalkeeper Emiliano Martinez to thank for a first half penalty save to deny John Lundstrum when the scores were still level.
It looked as if it was going to be a stroll for Liverpool, who were in total control and brought Thiago Alcantara on for his debut. The new signing from Bayern Munich was then guilty of a needless foul on Timo Werner to give Jorginho the chance to level from the spot, only for Allisson to save his tame spot kick.
"It was very important to win our next match after the 5-0 defeat. The Copa Libertadores is not only about skill, it's also about heart. And the players showed that."
In the Changzhou division, Kunshan FC edged Changchun Yatai 1-0, Nantong Zhiyun held a 1-1 draw with Sichuan Jiuniu, and Xinjiang Tianshan Leopard tied with Heilongjiang Lava Spring 0-0. Enditem
"We gave up our own advantage in tactics, only to let Jiangsu play its way comfortably," said Shanghai head coach Wang Zhiteng.