Okay,as an outlander, I sure can do these work by the contexts.
A. He has many thanks for for those who ever helping himself.
B. Chinese are generally but mostly not talking to strangers due to the fact they way their customs, manners and etiquette.
C .His good helping hands made him of good reputation and responsibility.
D. They established their successful relationships equally benefit each ( other ).
LOL :D
1. He appreciates the people whom helped and supported him when he needed.
2. Generally, Chinese does not speaking with strangers due to culture.
3. Helping others built his reputation, and people would like respect him.
4. They have wonderful relationship, and it brings lots of benefits to both of them.
希望对你有帮助!
He thank you very much for those in difficult times to help and support to him
Overall, the Chinese people are more subtle, and generally do not like to talk to strangers
It was his moral helpfulness that made him win people's respect
They have established a good relationship, which brings many benefits to both sides