Memes

There are issues within PSL, but that doesn't mean they aren't overall a Marxist group. The issues in PSL are largely varied by locality. At the moment, they are still at the forefront of agitation for Palestine, and do other cool work like labor organizing.

As for Xi Jinping, he's a Marxist, undoubtedly. The PRC has a Socialist economy, the large firms and key industries are overwhelmingly in the public sector. They have a long way to go to abolish commodity production, but they are well into the process of centralizing all of the means of production and developing the productive forces to aid in that task, eventually allowing for commodity production to be ended. I wrote a bit more on the subject than this oversimplification here, but I am more than willing to answer any questions you may have.

From what I can gather, it seems you aren't super familiar with Marxism beyond some of the basics, so you are definitely not alone in seeing China as some form of Capitalism just because it still has some private property and participates in global markets, but those complaints are generally resolved by reading Marx, Engels, Lenin, etc.