There is an insanity among the Western left that societies are born immediately communist shortly after revolution and that any failure is a betrayal of revolutionary principles. This is, incidently, why such a revolution is impossible and ultimately breaks up into autocannibalism. China is not a capitalist state for a variety of reasons:
1. There is no private ownership of land. All of it, literally all of it, is leased from the government in 40-80 year leases.
2. The government is not capitalist - it is a very traditional Marxist-Leninist vanguard party structure intended to operate as a dictatorship of the proleteriat.
3. There is no private ownership of the means of production of key industries, and limited private ownership of all industries over a certain size. Expanding to a certain size requires giving the Chinese government some aspect of control over your firm's capital, even if they do not ever exercise their right to use it.
China is a transitional socialist state. Transitional in that it is trying to develop from a pre-industrial economy to a post-industrial economy. Socialist in that it is doing by a vanguard Leninist party for the purposes of establishing a dictatorship of the proletariat where the people own the means of production.
China is also a market economy. This is simply where it is at its current stage of development. Just like the industrial revolution did not happen in Ancient Greece despite the invention of a steam engine, because social and material conditions did not permit or exert demand for an industrial revolution one cannot reasonably expect a society to develop from a pre-industrial feudal system into a post-industrial communist one within a single generation or without first going through the market revolution that creates a proletariat and a proletarian consciousness. This is where the current CCP has sharply turned away from Maoist thought, which though peasants were a revolutionary capable class - and while its a nice theory, evidence appears to bear out that developing in a more traditional way is more effective at developing the national economy and improving the material conditions of the poorest sectors of society.
China is socialist, and only westerners, with their fetishizing of deontological ethics where the principle is more important than the consequence, try to say otherwise. "It doesn't matter whether a cat is black or white, as long as it catches mice."
As for how they did on coronavirus... individuals like @JohnRawls fundamentally cannot imagine or deign to imagine a shred of Chinese competence. They are unquestionably doing better, and the numbers are likely reasonably accurate to boot. But this sort of 'China will collapse' and 'China's rise is a mirage' will continue to be a truism as it has been since the 1990s.