What is the relationship between He and Lu in ipartment?

In ipartment, He and Lu are only brothers and sisters in name, and they are not related by blood.

And belong to the reorganized family, and they are half-brothers, so they are not the same surname. They are brothers and sisters in name only, and they are not related by blood. When I was a child, my parents divorced and lived with my mother, Yuan Chunli. Lu's parents divorced and Lu lived with her father. My mother remarried with Lu's father and became a nominal brother and sister with Lu Zhanbo. In other words, your mother is Lu's stepmother, Lu's father is her stepmother, and Lu's aunt is her aunt, but they are not actually related by blood.

He and Lu are both primary school principals, and their relationship is very harmonious. Hu Yifei's mother Yuan Chunli appeared in the third season, played by Fan Qiongdan, and always wanted to introduce Lu to his girlfriend. Hu Yifei is very concerned about his brother Lu. Thanks to Hu Yifei's help, Lucai caught up. Unfortunately, Lu finally broke up with him, and the one who advised his younger brother still dared not confess to Ceng Xiaoxian.

Belongs to the fearless big sister, belongs to the silly character. Growing up under the protection of Hu Yifei, she was depressed for a long time after breaking up with Lin Wanyu, and only with the encouragement of Hu Yifei did she get back on her feet. Their personalities and genders are just the opposite, but they have a good relationship. The first thing Lu did after studying abroad was to find his sister. I believe he likes this sister very much, too. It can be seen from the exhibition memories when he first appeared that he liked his sister very much and even worshipped her. And Hu Yifei also regards him as his own brother and loves him. Help him stay in ipartment, help him chase girls, and break his heart. The relationship between the two is not brothers and sisters, but brotherhood.