A year ago, a notice sent to smartphones in Wuhan at 2am announced the world’s first coronavirus lockdown, which would last 76 days.

Early on Saturday morning, residents in the central Chinese city where Covid-19 was first detected were jogging and practising tai chi in a fog-shrouded park beside the Yangtze River.

Life has largely returned to normal in the city of 11 million, as the rest of the world continues to grapple with the spread of the virus’s more contagious variants.

Efforts to vaccinate people have been frustrated by disarray and limited supplies in some places and more than two million people worldwide have died.

Global Covid-19 cases and deaths
(PA Graphics)

Traffic was light in Wuhan but there was no sign of the barriers that a year ago isolated neighbourhoods, prevented movement around the city and confined people to their housing compounds and even apartments.

Wuhan accounted for the bulk of China’s 4,635 deaths from Covid-19, a number that has mostly stayed static for months.

The city has been largely free of further outbreaks since the lockdown was lifted on April 8, but questions persist as to where the virus originated and whether Wuhan and Chinese authorities acted fast enough and with sufficient transparency to allow the world to prepare for a pandemic that has infected more than 98 million.

China announced another 107 cases on Saturday, taking its total to 88,911. Of those, the northern province of Heilongjiang accounted for the largest number at 56.

Virus Outbreak China Wuhan
Residents practise tai chi in a park in Wuhan as life returns to normal a year after the Chinese city entered the world’s first lockdown (Ng Han Guan/AP)

Beijing and the eastern financial hub of Shanghai both reported three new cases amid mass testing and lockdowns of hospitals and housing units linked to recent outbreaks.

Authorities are wary of a new surge surrounding next month’s Lunar New Year holiday and are telling people not to travel and to avoid gatherings as much as possible.

Schools are being let out a week early and many have already shifted to online classes.

Mask-wearing remains virtually universal indoors and on public transport. Mobile phone apps are used to trace people’s movements and prove they are both virus-free and have not been to areas where suspected cases have been found.

Wuhan has been praised for its sacrifice in the service of the nation, turning it into a sort of Stalingrad in China’s war against the virus, commemorated in books, documentaries, TV shows and florid panegyrics from officials including head of state and leader of the Communist Party Xi Jinping.

Virus Outbreak
A man looks at a display about the effectiveness of face masks, as Wuhan marks a year since the 76-day lockdown (Ng Han Guan/AP)

China has doggedly defended its actions in the early days of the outbreak, saying it helped buy time for the rest of the world while pushing fringe theories that the virus was brought to the city from outside China, possibly from a laboratory in the US.

After months of negotiations, China finally gave permission last week for the World Health Organisation to send a team of international experts to begin investigating the virus’s origins. They are currently undergoing two weeks of quarantine.

A panel of experts commissioned by the WHO criticised China and other countries this week for not moving to stem the initial outbreak earlier, prompting Beijing to concede that it could have done better.

Meanwhile, in Hong Kong, thousands of residents were locked down on Saturday in an unprecedented move to contain a worsening outbreak in the city.

Hong Kong has been grappling to contain a fresh wave of the coronavirus since November. More than 4,300 cases have been recorded in the last two months, making up nearly 40% of the city’s total.

Authorities said in a statement that an area comprising 16 buildings in the working-class Yau Tsim Mong district will be locked down until all residents have been tested.