China has said it only counts deaths of COVID patients caused by pneumonia and respiratory failure as COVID-related.
The holiday travel rush is expected to last for 40 days, from Jan. 7 to Feb. 15, the Ministry of Transport said this week.
China's official death toll of 5,246 since the pandemic began compares with more than 1 million deaths in the United States.
The United States, India, Italy, Japan and Taiwan said they would require COVID tests for travellers from China.
Omicron was still the dominant strain in China, Chinese health officials said this week.