Beijing - China stopped issuing short-term visas to individuals from South Korea and Japan in retaliation for Covid restrictions on Chinese travellers.
The pause on South Korean visas will remain in place until "discriminatory" entry restrictions against China are lifted.
Japan and South Korea are not the only countries imposing entry requirements on travellers from China, where Covid cases are surging, but their measures are among the most stringent.
Last week, South Korea stopped issuing tourist visas for those coming from China, which the Chinese foreign ministry called "unacceptable" and "unscientific".
Japan, meanwhile, is currently allowing Chinese visitors into the country - provided they test negative for Covid. This is similar to the UK and the US, but Japan is also restricting flights from China to certain Japanese cities.
Beijing's embassies in both Seoul and Tokyo confirmed the new visa restrictions for visitors to China.
According to South Korea's Disease Control and Prevention Agency, around a third of all arrivals from China tested positive for Covid prior to the visa restrictions being put in place.
Many South Koreans support the idea of protecting their country from China's coronavirus surge - but not all are convinced that the decision is a purely medical one.
The South Korean curbs are supposed to last at least until the end of the month, which would give scientists time to analyse for any potential new variants coming from China.
At the moment, only a small number of business or diplomatic travellers from China are being allowed into South Korea. They must test negative before departure and also on arrival.
One Chinese man who tested positive escaped from a bus taking him to a quarantine hotel near the airport. Two days later he was caught by police in a hotel in Seoul.
-BBC