Still unexplained
The hunt for the origins of Covid-19 has for the past four years been a tangled web of politics, power struggles, and international finger-pointing.
An earthquake measuring 4.9 on the Richter scale on Wednesday hit Ludian county in China's southwestern Yunnan Province.
The quake struck at a depth of 10 km, the China Earthquake Networks Centre said.
Residents living near the epicenter said the tremor was "quite strong" when it struck.
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"The things I put on my water dispenser fell on the ground," said a resident in Longtoushan Township.
Li Shanyun, Communist Party of China secretary for the township, is worried about possible landslides caused by the earthquake, state-run Xinhua news agency reported.
"We are trying to verify if there are any casualties," Li said.
A magnitude 6.5 earthquake hit Ludian in 2014, killing 617 people and leaving tens of thousands of houses collapsed or severely damaged.
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