Yang Yi had always believed he was doing good deeds and that one must not leave their name behind when doing so; that's why he didn't only keep his name hidden, but also covered his face.
Doing good deeds brings happiness.
Although these good deeds could be troublesome and were bound to have some negative aftermath, Yang Yi felt he could leave Germany at any time, and, in theory, he shouldn't be found. Therefore, after returning to the hotel, he had a very happy evening.
As for what happened next, just watch the news.
The next day, Yang Yi checked the local news and indeed discovered a horrifying crime: five innocent youths were attacked by racists on the street and brutally castrated.
As for other matters, well, nothing else occurred.