It lacks context, but they aren’t just stumbling on the bat viruses. They look for them. China has the best virus hunters in the world and they spend all their time specifically hunting for weird bat viruses to take back to the lab. There are hundreds (thousands?) Of bat viruses that have been collected, cataloged, and experimented on in China, at the WIV and other labs.
It lacks context, but they aren’t just stumbling on the bat viruses. They look for them. China has the best virus hunters in the world and they spend all their time specifically hunting for weird bat viruses to take back to the lab. There are hundreds (thousands?) Of bat viruses that have been collected, cataloged, and experimented on in China, at the WIV and other labs.