Passengers of China-bound flights must provide negative COVID-19 test results before boarding, China's aviation authority said on Tuesday.
It comes as the government looks to further reduce the risk of imported coronavirus cases amid increased international travel.
Nucleic acid tests must be completed within five days of embarkation, the Civil Aviation Administration of China (CAAC) said on its website.
Tests should be conducted at facilities designated or recognised by Chinese embassies in host countries, it said.
The embassies will carefully assess the testing capacity of host countries and formulate travel procedures when testing conditions are met, CAAC said.
The announcement comes as countries struggle with testing capacity and speed. In parts of the United States, receipt of test results can take up to two weeks, while in some other countries, nucleic acid tests are reserved for people who have come in close contact with COVID-19 patients or who have symptoms of the potentially fatal disease.
In the past month, CAAC has allowed more foreign airlines to resume services in China and add flights to the country as the economy recovers.
Israel and Iran have exchanged airstrikes on Wednesday, as Iran again rejected President Donald Trump's claim that the US was in negotiations to end the war, which has roiled energy and financial markets, saying the US is negotiating with itself.
Cyprus has initiated a discussion with London on the future of British bases on the island, its president said on Wednesday, after a drone strike on a military facility this month triggered fears their presence could expose it to the wider Iran conflict.
Israeli Prime Minister Benjamin Netanyahu is racing to pass a state budget and stave off early elections he would likely lose, with the war in Iran so far doing little to improve his standing in the polls.
A five-star hotel near the Elysee presidential palace in Paris reopened on Wednesday after a blaze earlier forced around 400 people to evacuate the building, the French capital's firefighters and the hotel said.
A German push to tax sugary drinks and ban energy drinks for under-16s will be voted on by the country's assembly of regional states on Friday as public and cross-party support emerges for tougher action on obesity and related illness.
Kuwait's Directorate General of Civil Aviation (DGCA) has announced on Wednesday that a drone targeted a fuel tank at Kuwait International Airport, which led to a fire breaking out on the site.
The Pentagon is expected to send thousands of soldiers from the army's elite 82nd Airborne Division to the Middle East, according to reports on Tuesday, adding to the massive military buildup even as the Trump administration seeks talks with Iran.
The Philippines is working with Washington to secure waivers and exemptions so it can obtain oil from US-sanctioned countries to ensure supply, its ambassador to the United States has announced.
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