What episode is the good times ring falling into the hotel sewer?

Yuan Hao took Shanshan to Yuan Jia for dinner, and confessed to Shanshan that he was pretending to be Koharu's boyfriend. Unexpectedly, Shanshan, who was supposed to be jealous, said that she understood that business-like attitude made Hao Yuan look uncomfortable. Shanshan came to Yuan Hao's house, watched him take out a badge and asked Shanshan if she remembered. Shanshan looked puzzled, but she heard Hao Yuan explain that this was her dream ten years ago. She liked Titanic very much at that time, and felt that she must go to Kaufftown, the stop of Titanic. Hao Yuan went to this place on her second business trip and brought back her dream. Hearing this, Shanshan was deeply moved. At that time, they were madly in love and decided to open a room outside. I didn't expect everything to go well. At the most critical moment, Hao Yuan suddenly said that he should take a bath and rushed into the bathroom. Hao Yuan hid in the bathroom, at a loss. She accidentally washed their wedding rings down the drain. Knowing this, Shanshan immediately questioned whether Hao Yuan was intentional, because he didn't want to marry himself at all. But no matter how Hao Yuan explained it, Shanshan didn't believe Hao Yuan. She said she wouldn't get married if she couldn't find the ring. Hearing this, Hao Yuan said that if she couldn't get married, she wouldn't get married. After returning home, Shanshan cried to her mother about Hao Yuan's crime. After learning these things, Shanshan's mother immediately came to Yuan's house. Shanshan's mother obliquely accused Yuan's father of being a drag, so they still didn't get married. Dad Yuan once again promised to apply for a visa immediately. After some efforts, Hao Yuan found the ring and rushed to Shanshan's home to ask for forgiveness. Unexpectedly, she saw Shanshan writing an email to a lawyer to sue the hotel for dereliction of duty.