Su Jin always found Su Qiaoqiao very familiar, but she couldn't figure out why. There was clearly no such person in her life. The only way to find out the truth was for her to meet Su Qiaoqiao face to face. Otherwise, Su Qiaoqiao would never admit it. Su Jin also knew that the president couldn't just act. They needed evidence.
After thinking for a while, Su Jin seemed to have an idea and shared it with her father. If they followed her plan, they should be able to get a full confession out of Su Qiaoqiao. If Su Qiaoqiao only wanted a life of glory and riches, Su Jin would let her off. But if Su Qiaoqiao had other intentions, she wouldn't let her off so easily. The president was very supportive of Su Jin's plan.