BEIJING, April 28 (Xinhua) -- China is expected to see an average of 2.15 million daily border crossings during the five-day May Day holiday, representing a 27 percent increase from last year, according to the National Immigration Administration (NIA) on Monday.

The peak of cross-border travel is anticipated on May 1 and May 5.

Traffic at China's major international airports is set to grow steadily, with Shanghai Pudong expected to lead with 101,000 daily crossings, followed by Guangzhou Baiyun at 50,000 and Beijing Capital at 45,000, the administration said.

As travel between Hong Kong, Macao and Chinese mainland continues to rise, the May Day holiday is expected to bring even higher volumes, further amplified by a series of major events scheduled across the regions.

The NIA has urged border authorities to closely monitor cross-border traffic, providing regular updates to assist travelers. The agency also called for adequate security staffing to ensure wait times at border crossings do not exceed 30 minutes.