Scott Palmer, an intellectual property lawyer at Sheppard, Mullin, Richter & Hampton, which represents American corporations in China, played down the significance of the timing, emphasizing that the country’s law specifies that the trademark office should complete its examination of a filing within nine months. Mr. Trump had registered the trademarks last April.

“There’s nothing inherent in that timing that is questionable or strange or should be viewed as out of the ordinary,” Mr. Palmer said. “The Trademark Office has been working on getting this timing right for a few years now, and the fact that they are hitting the target doesn’t mean they are likely to have played favorites.”

Critics say Mr. Trump’s trail of trademarks could leave the president vulnerable to potential conflicts of interest. In February, Senator Dianne Feinstein of California sounded alarms about China’s decision to award Mr. Trump his trademark in construction services, saying it could be a breach of the United States Constitution and that foreign governments could use his trademarks to influence foreign policy decisions.

“This is an astonishing development,” United States Senator Ben Cardin, Democrat of Maryland and ranking member of the Senate Foreign Relations Committee, said in a written statement. “It’s clear to me that officials in Beijing have come to appreciate the potential return on investments for China in having a positive, personal business relationship with the President of the United States, who has not taken appropriate and transparent steps to completely sever his relationship from the corporation that bears his name.”

It is unclear whether the Trump Organization will profit from the new trademarks. While the company has pursued a large number of hotel development deals in China, one of its executives recently suggested that the organization would drop those projects.