My theory on Wisi is that he has some prior relationship with FUQI or its founder, and he has developed a personal vendetta against them. That would explain his persistence and apparent hatred of them. He doesn't fit the profile of a paid basher; his remarks have too personal a tone for that.
Paid or not, he (she, they) follows a simple pattern: 1- Start with a quote out of context from a previous blogger, 2- Repeat a well known fact (they have not filed on time, etc) 3- Add some sarcastic and speculative comment on the previous blogger or on FUQI. Never ever answer a pertinent point or a question.