on accident. It wasn't meant as a weapon, but rather they were studying the virus and using it. Somehow they accidentally leaked it from the lab. They posted a job in October about studying the Coronavirus from bats at this lab. This lab is coincidentally near the food market that people think the Virus came from.

"Taking bats as the research object, I will answer the molecular mechanism that can coexist with Ebola and SARS-associated corona virus for a long time without causing disease, and its relationship with flight and longevity. Virology, immunology, cell biology, and multiple omics are used to compared the differences between humans and other mammals."