Ipartment Shang's two marriages were the first episode of which season?

The first time: the first episode of the second season: Xiaoxian, Ziqiao, Yifei and Guangu meet to go to a newly opened bar and meet an old acquaintance Zhang Wei. Knowing that Zhang Wei would hold a wedding at noon the next day, Zi Qiao's restless elements became active, and he urged Zhang Wei to implement the "ultimate single night" plan on the last night before marriage. When Zhang Wei woke up from a hangover, it was already four o'clock the next afternoon. After missing the wedding, he hurried to the wedding site, but the result was greatly unexpected. Along the way, he felt like riding a roller coaster. The note left by Xiaoxian and Ziqiao became his lifeline.

The second time: Season 4 episode 12: Zhang Wei announced that he has a girlfriend and is ready to get married. Under the pressure of everyone, he promised to introduce his girlfriend to everyone. Lv Ziqiao was appointed as the best man at the wedding by Zhang Wei. Guangu and Youyou decided to use their own wedding plan and try it out at Zhang Wei's wedding. Zhang Wei's flash marriage partner made her debut. Meijia and Yifei think that Zhang Wei has found a good girl, but Ceng Xiaoxian doesn't think so. Ceng Xiaoxian came to Zhang Wei and quietly met Zhang Wei's fiancee. They were classmates, but they silently confessed to Ceng Xiaoxian. But Ceng Xiaoxian has been resisting, and the result was seen by Meijia. Ceng Xiaoxian jumped into the Yellow River and couldn't wash it clean. Zhang Wei, the naked groom, moved away silently, and as a result, Zhang Wei gave up the wedding prepared in advance.