HARBIN, April 14 (Xinhua) -- The city of Suifenhe, at the China-Russia border in northeast China's Heilongjiang Province, reported a total of 322 confirmed novel coronavirus (COVID-19) cases from overseas by Monday, local epidemic prevention and control authorities said Tuesday.

The city also saw 38 asymptomatic COVID-19 infections by the end of Monday.

Local authorities said that the Suifenhe port, a major land checkpoint at the border, remains shut down its passenger inspection channel.

Suifenhe on Monday put a mobile laboratory into use, which has greatly improved the city's nucleic acid testing capability. So far, the city's daily testing capability has exceeded 1,000.

The city has not seen local cases resulting from virus carriers traveling from abroad.