Are you even fluent in English? How does that have anything to do with this?
The penultimate term means nothing. All terms are equal in an OR statement.
Bingo.
EQUAL.
Therefore Chen is Zhou's friend/buddy/business partner/associate.
No. An OR statement does not imply that it is all at once. That is an AND statement.
In fact, in speech and writing, an OR statement is also often exclusive; i.e., it implies that it is not two or more of the terms at once. This isn't the case here, but your conclusion is still fallacious.