British and Canadian nationals will be able to travel to mainland China for up to 30 days without a visa from February 17.
China's foreign ministry said visa-free entry would be permitted for tourism, business or visits to family and friends, with the policy set to stay in effect initially until 31 December.
It follows Prime Minister Sir Keir Starmer's official visit to China last month, where he and Chinese President Xi Jinping agreed travel rules would be relaxed.
Starmer said the agreement would make it easier for businesses to expand to China, though critics say Downing Street's push to reset relations with Beijing overlooks human rights and national security concerns.
Announcing the policy's start date on Sunday, China's foreign ministry said the scheme would "further facilitate people-to-people exchanges between China and other countries".
The move brings rules for UK and Canada passport holders into line with 50 other countries, including France, Germany, Italy, Australia and Japan.
Hundreds of thousands of British people could potentially benefit from the change, with around 620,000 travelling to China in 2024, according to the Office for National Statistics.
During his official visit to China in January, Starmer said British businesses had been "crying out for ways to grow their footprints in China".
Xi and Starmer also agreed to deepen trade relations in services, healthcare, green technology and finance - though no sweeping trade free trade agreement was announced.
The visit, which was the first by a British prime minister since Theresa May in 2018, was criticised by some opposition figures.
Shortly before heading to China, Starmer's government approved plans for a major new Chinese embassy in central London, despite opponents claiming it could be used as a base for spying and pose security risks.
Canadian PM Mark Carney also visited China in January and held a key meeting with his Chinese counterpart Xi Jinping in Beijing. After the meeting, they announced lower tariffs, signalling a reset in their countries' relationship.
China is expected to lower levies on Canadian canola oil from 85% to 15% by 1 March, while Ottawa has agreed to tax Chinese electric vehicles at the most-favoured-nation rate, 6.1%, Carney told reporters.
The deal is a breakthrough after years of strained ties and tit-for-tat levies. Xi hailed the "turnaround" in their relationship but it is also a win for Carney, the first Canadian leader to visit China in nearly a decade.
The deal could also see more Chinese investments in Canada, right on America's doorstep
Source: BBC