I think he could have beaten Momota as well had he been more confident , focused and a little fitter. Notice that he put up a little better fight against Momota than Antonsen.
Closest is nothing in this MS world. If you don't have patience, you can't beat a style like Momota has. He will just drag you into his game and force you to error somehow in the rallies without much effort. Sai Praneeth in one interview before this world championships said that player should not enter into Momota's style while playing him. Dictate the pace and don't make errors. This is what needed to beat him. Easier said than done.
As they always say, make him play from below the net. Easier said than done when someone as good as Huang ya Qiong is standing in front of the net.