I assume Jiang tempers his criticism so it is relative to what the student could reasonably be expected to know. Otherwise it could be very frustrating for the student. Imagine a ddk player being told angrily every other move or so how stupid their moves are.

I don't know about online, but he has done it in person.

I was not his student, but I've heard from others.

On the other hand, he could be hinting at his textural ruggedness, comparable to "What a mean steak!"

_________________
Ko is the best solution.
With Ko, I can keep eating and drinking until I am full.

Visit >>>Koosh's Study Journal<<<

He knows and in fact has a good humor about it. He can say, "ah, this is hard for you" it a few different ways and you know whether he means that something is beyond you versus this is something that should by totally within your abilities and you're not playing up to them. If you are getting lessons online, make sure you have audio so you can hear his booming voice. (I am actually not sure if he requires that, but he might because I haven't seen him type much.) This is important for improvement.

Rather than mean, I would say disciplined. For example, when he presents a life&death problem, he will not just give you something with a clear goal. Instead he will say, "Don't show me moves! First tell me the result." Then if you say, "black can kill" he'll press: "how many ways can black kill?"

He's not very interested into getting far into your games once they start becoming nonsense for one side or another, so I think you have to be pretty strong to get far into the middle game in a review with him. For this reason, I think he is a better teacher for dans than for kyus. Also, Mingjiu likes to show a lot of josekis, many of which are not in the books, so I think it would help if you are into learning that sort of thing.

Another successful recent student of his is Calvin Sun (AGA rating 7.7), who was a youth junior and senior rep in the World Youth Goe Championship for a few years in a row and was a 3-time Redmond Cup winner.

Are there japanese speaking online pro teachers?

Best Tapir

I think a number of Nihon Ki-in pros teach online. You many be able to find them on the Nihon Ki-in website: http://www.nihonkiin.or.jp I think they mostly use the Nihon Ki-in's server called Yuugen no Ma.

Maeda Ryo teaches on KGS Plus. You can try to reach him and see if he wants to teach online.

Another noticeable student of his is Aaron Ye (AGA 5d now) who just won his first junior Redmond Cup at the age of 9 and placed 4th in the WYGC junior division.