The COVID-19 coronavirus being man-made and spread by the Chinese is one of the false conspiracies related to the pandemic.
The Office of the Director of U.S. National Intelligence had released a statement on 30 April 2020 rejecting the conspiracy theory that it was manmade or genetically modified. It also said that the intelligence community would continue examining whether the outbreak began through contact with infected animals or if it was the result of an accident at a laboratory in Wuhan.
The World Health Organisation(WHO) has stated that COVID-19 is a zoonotic virus, and bats appear to be the reservoir of COVID-19 virus. The intermediate host(s) has not been identified yet. It stated on 26 March 2020 that all available evidence suggested that SARS-CoV-2(the coronavirus) had a natural animal origin and that it is not a manipulated or constructed virus. However, several investigations are underway to find the source of the virus.
As of now, based on the official statements and evidence, the Chinese did not make the virus or spread it to other countries deliberately.
The COVID-19 pandemic has given rise to a lot of potentially dangerous misinformation. For reliable advice on COVID-19 including symptoms, prevention and available treatment, please refer to the World Health Organisation or your national healthcare authority.