Yes I guess the English on that site is not working properly and is too limited for your purposes.
According to the People’s Daily back in March 2005, Dong’an Auto Engine Co., Ltd acquired a 100 percent stake of Harbin Aviation Industry Co., Ltd (Hafei).
So maybe you can try Dong'an at this email address:
Dong'an Engine's Chinese website is:
Hafei has some very nice high quality cars to offer but it hasn't been the most pro-active in gaining overseas accounts. Maybe because its state-owned and you know as the saying goes, "good enough for government work".
These companies are all a part of Avi China and have close ties to Mitsubishi.