Yin Yinyin is indeed a good person.
Don't be fooled by how Yin Yinyin seems to be asking Leyu to do some villainous deeds when discussing plans, because he actually takes Leyu's reputation into consideration when pushing plans, ensuring Leyu doesn't do anything 'unreasonable'.
You see, this scapegoat is really shameless, so when Leyu fights, it's justified.
Yin Yinyin even took care of Leyu's feelings, surely knowing that, even though Leyu has committed murder, arson, looted homes, and exterminated clans, he is still a pure-hearted good guy inside, hesitant about hurting ordinary civilians.
You see, this scapegoat is really irritating, so when Leyu fights, he can do so with a clear conscience.
The most brilliant part is that Yin Yinyin gave the scapegoat an intriguing identity: a relative of the Ding Family!
Brilliant!
This is practically a way to boost Leyu's achievements!