The question is, why would China release a lab engineered virus when they are trying to conquer the world via the Belt/Road Initiative? Those two things would appear to be at odds with each other.
If China did release the virus (and it certainly appears that such a conclusion is reasonable), is it possible that there are two competing factions at work in China, each struggling to take control (i.e., the Belt/Road people fighting against the biowarfare scientists for domination)? One faction wants an economic takeover and one wants to start a war.
I have heard there are competing power structures within the PLA