I tried, but didn't find any online reviews of this school...and usually (not always), the real stinkers will have someone posting a warning somewhere. So this is a cautiously good sign...
Yanji is in the Yanbian Autonomous Zone, an area near and dear to my heart. It's a bit rough and underdeveloped, but the people are great. Most folks there are ethnic Koreans, but it's a real melting pot of cultures. My favorite food in all of China comes from Yanbian...it's a mix of Korean, Northern Chinese, Manchu, and Mongolian...and it totally rocks.
But oh, man, it's cold, cold, cold. Winter overnight low temps of -50C are not at all uncommon. It's dry (make sure your apartment will have year-round 24-hour running water, or don't take it!) and windy and covered in coal grime.
Are you sure you want to move to such a place, my jasmine flower?