Video app TikTok said Friday that its new CEO is Shouzi Chew, the new CFO of its Chinese parent company, ByteDance.

TikTok denies it is a national-security risk and is suing to stop the administration from the threatened ban. TikTok denies that it has shared user data with the Chinese government or that it would do so if asked. It competes with tech giants such as Microsoft and Amazon that provide cloud services as well as business-software specialists like Salesforce. The president said on Aug. 18 that Oracle was “a great company” that “could handle” buying TikTok. He declined to state his preference between Oracle and Microsoft as buyers.

HONG KONG Walmart said Thursday it may join Microsoft to buy the U.S. business of TikTok, the popular Chinese-owned video app that has come under fire from the Trump administration. Walmart said in a statement that a deal with Microsoft and TikTok could help it expand its advertising business and reach more shoppers. Microsoft has confirmed discussions with TikTok; other tech companies such as Oracle are also reportedly interested in a possible acquisition. U.S. authorities are concerned that TikTok would turn over user data to Chinese authorities and that it censors content that would upset China. Microsoft and Walmart are already business partners, with Microsoft providing cloud computing services that help run the retailers stores and online shopping.