In which episode of ipartment 4, Nolan sent a message to Ceng Xiaoxian?

6 Episode 6: Joe, the son of Top Gun, jumped off a building and was hung on a crooked-neck tree, saving his life. The injured Lv Ziqiao was severely slapped by Meijia, and the injury was aggravated. Zhang Wei returned to the apartment and lived happily with everyone. Nolan is going to study in America. Hu Yifei heard the news of her confession to Ceng Xiaoxian, and Yifei was jealous again. Zhang Wei and Lv Ziqiao formed a small team, and once again launched the pursuit of beautiful women in the bar. Finally, Zi Qiao was unfortunately defeated. Hu Yifei always took Nolan and Ceng Xiaoxian to heart. She encouraged Ceng Xiaoxian to meet Nolan, but Ceng Xiaoxian, who lived up to expectations, also "collapsed" in the face of emotional problems. Hu Yifei saw Nolan's Weibo, the in the mind is not the taste. Adopt me,,,,,