Chinese arms in Myanmar- but be aware that the United Wa Army are allies of and get their weapons from the PRC.
A longer opinion piece from the same paper on China's meddling in the ongoing civil war, and earlier parts of history.
I was sure I had found a PRC diplomatic statement about the Sri Lankan Civil War and China's aid for legitimate governments opposing separatism, but my 百度夫 is weak today - or I need to VPN into China to get better search results. I'll try to find time to dig it up, but some poking about will find plenty on Chinese aid to Sri Lanka in the first two decades of the 21st century while the war was ongoing.
I agree that one needs to read past the red scare. The PRC, despite what the US says, is a rational actor not a boogeyman. Sadly, news sources for Myanmar are scarce, so I try to remove the editorialising and focus on the factual events - since editorialising and red scare aside, the Irrawaddy has enough of a good reputation to not make up events wholesale.
And there it comes down to, sadly, that the PRC's "we don't meddle" line is sadly untrue. And while I do think that so far the evidence is that the PRC is not as destabilising and destructive for others as the US, there is no sign that a rise in the influence of the PRC will help much - instead we'll see more of what there has been in Pakistan, Myanmar, Sri Lanka, Laos, and others on a wider scale.
An entrenching of existing inequality, and helping the current dominant factions to cement their place in return for resources and Chinese capital getting to accumulate.