SHANGHAI, China — Houston Rockets sneakers and other merchandise were pulled from several Nike stores in major Chinese cities amid the furore surrounding a tweet from the team's general manager in support of anti-government protests in Hong Kong.

Managers at five Nike stores in Beijing and Shanghai told Reuters during visits on Thursday they had been told in recent days via a memo from management that all Rockets merchandise had to be removed. Reuters was unable to view the memo.

Although Rockets general manager Daryl Morey has since apologised for his tweet last week, National Basketball Association (NBA) Commissioner Adam Silver further angered authorities when he said the league backed Morey's right to exercise his freedom of expression.

Despite the controversy, the NBA was pressing ahead with an exhibition game between the Los Angeles Lakers and Brooklyn Nets in Shanghai on Thursday night. Promotional events earlier in the week had been cancelled.

The stakes are high for NBA, whose league business in China is said to be worth more than $4 billion. The world's most populous nation is Nike's top source of revenue growth as other regions slow.

Three Nike stores in Shenzhen also kept Rockets merchandise off the shelves, as well as NBA products in general, staff told Reuters by phone. Three Nike stores in Chengdu, a bustling inland city in southwest China, also removed Rockets products.

Nike and its China office did not respond to multiple Reuters requests for comment.

A specialist NBA store at Super Brand Mall, a major shopping centre in the Shanghai financial district of Lujiazui, has also removed all Rockets-related merchandise.

"Other stuff, there hasn't been any impact, and no one has said we need to withdraw it," said a store manager, laughing. "If they say that all NBA stuff has to be withdrawn then our store will go bankrupt."

At two basketball-themed NBA Playzone family entertainment centres in Shanghai and Beijing opened by NBA China, staff confirmed that Rockets products had been removed.

Rockets products were hot before and when you stepped into the store, it was full of red.

"Rockets products were hot before and when you stepped into the store, it was full of red. Now, it is mostly yellow and blue," the colours of the Golden State Warriors, said a manager at the Shanghai Playzone, who like the NBA store employee declined to be identified because of the sensitivity of the issue.

NBA China did not immediately respond to a Reuters request for comment about the entertainment centres.

Major Chinese e-commerce platforms Alibaba and JD.com have taken Houston Rockets merchandise off their sales platforms, including mobile apps.

Searches for sneakers with the NBA logo on Alibaba and JD.com also yielded no results. Those include collaboration sneakers marketed with brands such as Nike and Carlyle-backed Supreme.

A handful of individual online merchants still sell the sneakers.

Alibaba, which declined to comment, told domestic media that Morey's comments had seriously hurt the feelings of the Chinese people, and that there was no room for negotiation.

JD.com, which also did not comment, told local media that the firm deeply resented and strongly condemned Morey's remarks.

Two of the largest online resale marketplaces for sneakers in China have also removed all branded shoes connected to the NBA, according to four sneaker traders.

Poizon and DoNew, two mobile shopping apps popular among fans of designer sneakers, have taken NBA shoes off their platforms, traders said.

A Reuters search on Poizon and DoNew's apps with the keyword "NBA" returned no results.

Poizon did not respond to an emailed request for comment and phone calls to DoNew's office in Shanghai went unanswered.

"As long as the bosses of Nike and Adidas don't come out and say something stupid and get banned by China's central government, I think sneaker resales in China will remain pretty profitable," said Zhu Junwen, a reseller in Guangzhou.

Adidas is in the middle of a reported $200 million, 13-year endorsement contract with Houston Rockets star guard James Harden, who is the centrepiece of the apparel maker's basketball shoe lineup.

"But if (Nike and Adidas get banned), that would be the end of it," Zhu said.

By David Stanway and Ryan Woo with additional reporting by  Yawen Chen, Josh Horwitz and Se Young Lee; editor: Gerry Doyle.