The secret meeting in Beihai Ha, the Chinese leadership's annual "talk table" resort, is said to have taken place in early August.
Not only resting, relaxing by the long beaches of the famous resort in Hebei province, the vacation in Beihai is also an opportunity for the most powerful people in China to meet, exchange and exchange with each other,
As Beijing faces many sanctions from Washington successively and struggles with the complicated domestic economic situation, this year's Beihai vacation has become the focus of attention for many observers.
Observers point to some signs that this important meeting took place.
Prime Minister Li Keqiang was reported on August 17 by state television station CCTV that presided over a meeting of the State Council in Beijing after nearly two weeks of absence.
Wang Huining, who ranks 5th in the Communist Party's hierarchy, also attended a meeting of the Chinese Youth Union in Beijing on the same day.
The appearance of Mr. Dinh, who is always beside President Xi everywhere, and many Politburo officials are considered by observers to be clear evidence that this year's secret holiday in Bac Doi Ha has ended.
President Xi Jinping and many Politburo officials have not appeared since attending the launch of the Bac Dau satellite navigation system on July 31.
The second sign is that security in Bac Doi Ha has been particularly tight since the beginning of August. However, a familiar sign for this secret event is the meeting between leaders and scientists and scholars.
Observers commented that this showed that the important and secret annual event in Bac Doi Ha under President Xi Jinping had many changes.
During the Politburo meeting last month, Mr. Xi laid out a national development strategy until 2035, and decided that the Central Committee, the Party's policy-making body, would hold a plenary session.
This means that the leadership has reached a consensus on a major policy direction earlier than usual.
Bac Doi Ha is a resort located by the Bohai Sea, 280 km east of the capital Beijing.
But a Chinese Communist Party official who knows about the problems in Beihai said that the summer vacation is now like a real vacation.
He also said that this year the attendance of former leaders was also smaller due to the Covid-19 pandemic.
Co To of Nanjing University argues that the meeting in Beihai has been more flexible since Xi became General Secretary of the Communist Party of China in 2012. "The rigid principle is no longer there.