There are no communist countries because capitalism has to be overthrown globally in order for actual communism to be achieved. That said, China is a state governed by the Communist party where Marxism-Leninism is the official state ideology. 87.6% of young Chinese identify with Marxism, and the party over 95 million members.

All the core economy is state owned and directed towards the needs of the people as opposed to being run for profit.

China has now eliminated abject poverty, and in fact China is the only place in a world where any meaningful poverty reduction is happening. If we take China out of the equation poverty actually increased in real terms:

If we take just one country, China, out of the global poverty equation, then even under the $1.90 poverty standard we find that the extreme poverty headcount is the exact same as it was in 1981.

The $1.90/day (2011 PPP) line is not an adequate or in any way satisfactory level of consumption; it is explicitly an extreme measure. Some analysts suggest that around $7.40/day is the minimum necessary to achieve good nutrition and normal life expectancy, while others propose we use the US poverty line, which is $15.

China does massive investments in infrastructure. They used more concrete in 3 years than US in all of 20th century and built 27,000km of high speed rail in a decade. 90% of families in the country own their home giving China one of the highest home ownership rates in the world. What’s more is that 80% of these homes are owned outright, without mortgages or any other leans. Real wage (i.e. the wage adjusted for the prices you pay) has gone up 4x in the past 25 years, more than any other country. This is staggering considering it’s the most populous country on the planet. Chinese system also results in high social mobility unlike western capitalist alternatives.

And finally, some further links discussing this in more detailed by @muad_dibber@lemmygrad.ml