A charitable foundation received an unsigned donation  After investigation, it was learned that it was donated by Lin Chuan, Wu Fei, Zheng Fu and one of Guo Bo
When asked, Lin Chuan said, I didn't donate, Zheng Fu said: it was donated by Wu Fei, Wu Fei said: it was donated by Guo Bo, and Guo Bo said: it wasn't donated by me
Lin Chuan lied and donated it.