Inbound passengers queue through customs clearance at the Harbin Taiping International Airport in Heilongjiang province. [Photo provided to chinadaily.com.cn]

China will see an average of 1.85 million cross-border trips made every day during the upcoming Spring Festival holiday, a 9.5 percent year-on-year increase, the National Immigration Administration estimated.

Large international airports in China are expected to see a peak in the number of passengers exiting from Chinese New Year's Eve on Tuesday to Thursday, the administration said.

They will see an influx of passengers on Feb 3 and Feb 4, the last two days of the Spring Festival holiday.

The administration has asked ports across the country to strengthen monitoring of cross-border travel flows and issue related information promptly to help people arrange their trips properly.

It has also asked them to deploy more workers and open a sufficient number of passages to ensure that travelers spend no more than 30 minutes in line.