Border inspection authorities across China saw 1.8 million inbound and outbound trips on Wednesday, the New Year's Day holiday, the National Immigration Administration said on Thursday.

It marked a 13.7 year-on-year increase, the NIA said in a statement.

Of these trips, 869,000 were made by residents on the Chinese mainland, which was a 11.1 percent year-on-year increase. As many as 749,000 were made by residents of Hong Kong, Macao and Taiwan, a 12.8 year-on-year increase.

About 185,000 were made by foreign citizens, a 33.6 percent year-on-year increase, the data showed.

Border inspection agencies also checked 67,000 vehicles, including ships, trains and automobiles on the day, representing a year-on-year increase of 14.7 percent, it said.