Guo Sangan is Chuanxinlou's younger brother. Even if Chuanxinlou obtained the Dao Fruit, it was because of Guo Sangan's suggestion that he had the chance. It stands to reason that Chuanxinlou must have saved Sangan. In fact, Chuanxinlou not only failed to save Sangan, but actually pushed Sangan hard....