Reference video:
You can see from this video that Kreanga's backhand is no longer unique to him. Look at the point at 1:44, the backhand looks almost the same like Kreanga's one. Then he follows up with a 反手弹击 which ultimately destroys ma lin. Horizontal motion backhand is the future. No more deciding between down-up motion and left-right motion. I looked at Zhang Jike's backhand which is basically the same except that he uses the chiquita flip motion instead, i.e. more wrist. It's actually even more effective than Kreanga's one, albeit with less power, but with much faster recovery time. I'll be choosing the chiquita backhand shot for all my backhand needs in the future. It's very flexible as well as it can be used both short balls and long balls
Problem solved!