You choose the perfect time of the year to go up to Qungjing. In fact if you could get yourself on a tour, there's an area a bit further up in the middle of the mountain that has the best cherry blossom views, but those are normally fully booked months in advance and even the locals have difficulty getting in sometimes.
I hope you had a nice time in Taichung, I could have given you some recommendations if I knew you were going, I lived there for 4 years!
I didn't see anyone pinning Qingjing Farm when I pinned this location on the map. I saw your post about a waterfall near it. We booked a tour, but due to the limited time, we only had a few hours to explore. We might have missed a lot of attractions, but I'm already satisfied with the view.
I had a great time in Taichung, even if it was a short one. I don't know why I didn't tell you I'm going to Taiwan when it's in your username. HAHAHA. Maybe because of the drama. Taiwan helped me move on from it faster, so it's still great.
P.S. I love Taiwan's transportation system so much!