I wonder if dude knows what 'concern trolling' is. It's where you say "yeah, I'm on your side, but I just have a few doubts about this..." aka industry-sponsored bullshit.
I'm an environmental scientist AMA. More than 95% of the world's climate scientists agree that human activity is causing climate change. However while it's fairly easy to demonstrate the human effect on the global climate over the long-term, seasonal weather is another matter.
Don't forget, last year was a HUGE El Niño year. This contributed to record ice melt in the Arctic Ocean over the past year, and this year we also reached a record low for global ice coverage. It has been unseasonably warm in the Arctic Ocean for most of the winter, but meanwhile Siberia has been very cold.
While I am a scientist I'm not a meteorologist so I can't really comment with expertise on Kunming's weather. I do think it probably has to do with the Arctic weather and El Niño. Actually there was recently an article I saw calling the Himalayas 'the third pole' because there is so much ice and snow there. Interesting.
*Edit: by the way does anyone know of a good weather prediction website or app that doesn't require VPN? It seems like the official services here are not really that accurate from what I can see, and at more than three days out they just tends towards '100% clear and sunny' when it's dry season and '100% cloudy/raining' the rest of the time. I guess April is a tossup?