Well, it's not a surprise that it gets worse in Lubuntu, since they unfortunately not seed fonts-noto-cjk yet.
https://code.launchpad.net/~gunnarhj/ubuntu-seeds/lubuntu.xenial_chinese-fonts/+merge/288194
It would be good if you could try Ubuntu or Ubuntu MATE also, and let us know how it looks there.
Well, it's not a surprise that it gets worse in Lubuntu, since they unfortunately not seed fonts-noto-cjk yet.
https:/ /code.launchpad .net/~gunnarhj/ ubuntu- seeds/lubuntu. xenial_ chinese- fonts/+ merge/288194
It would be good if you could try Ubuntu or Ubuntu MATE also, and let us know how it looks there.