Guo Degang, the country's most prominent performer of traditional xiangsheng, a form of Chinese comedic dialogue, is under investigation by local authorities in the city of Wuhan in central China, local media reported.
Guo's show on Friday in the northwestern city of Xi'an was cancelled due to "venue issues", a statement on ticketing platform Damai released by his promotion company showed.
The exhibition centre hosting the performance in Xi'an, which also cited "venue issues" on Wednesday, said the show had been "postponed", without giving a new date.
Local media reports said several of Guo's shows scheduled in August across cities were cancelled.
The investigation highlights China's stricter controls and censorship of the entertainment and arts industries, where performers and artists have to navigate an environment where "red lines" are often unclear and shifting.
Guo was reported to Wuhan's culture and tourism authorities after he changed a lyric from "it is quiet along Weishan Lake" to "it is quiet in the Forbidden City" while performing at a show in the city in July, according to local media reports and videos shown on social media platforms.
The Forbidden City, once home to China's emperors for hundreds of years, is now a museum that attracts more than 10 million visitors each year.
Guo's performance had been approved in advance by local authorities in Wuhan, but the lyric change had not, which might have violated regulations governing commercial performances according to The Paper, a Shanghai-based news outlet.
The lyrics are from Playing My Beloved Pipa, a song from Railway Guerrilla, a well-known 1950s film about Communist-led guerrillas fighting Japanese forces during World War II.
Pipa is a traditional Chinese stringed instrument, similar to a lute.
It is a popular song among the public.
It was once played at CCTV Spring Festival gala in 1998, and was also selected in 2019 by the Chinese Communist Party's Publicity Department as one of 100 songs recommended to mark the 70th anniversary of the founding of the People's Republic of China.