Why did Wu Sanan sue Luo Yongqing?

Wu Sanan sued Luo Yongqing because Luo Yongqing used fake copper coins when telling Mr. Er's fortune, which led to a contradiction between Mr. Er and Wu Sanan, who sued Luo Yongqing. Luo Yongqing is a fortune teller who loved you 10 thousand times in a Chinese Odyssey. The second husband went to Luo Yongqing for fortune telling because of his love problem. Luo Yongqing told Sir Zhong that his fortune was not good recently and he needed to use special methods. The method is to poison Wu San 'an. The second husband followed Luo Yongqing's advice and poisoned Wu Sanan. But later, the second husband found out that Luo Yongqing gave him fake copper coins, not real copper coins. This led to the contradiction between Er Dang Jia and Wu San 'an, because Wu San 'an believed that Er Dang Jia had deliberately harmed him. Wu San 'an therefore sued Luo Yongqing, accusing him of cheating the second master with fake copper coins and causing the second master to poison him. Luo Yongqing was arrested for this and is awaiting trial by law. To sum up, Wu San 'an sued Luo Yongqing because Luo Yongqing cheated Sir Zhong with fake copper coins, which led to the poisoning of Wu San 'an by Sir Zhong and caused conflicts.