Sister flowers refer to the biological sisters of beautiful sisters. Like two petals of a flower. Such as: network "beautiful leg mm" Kong Yansong and twin sister Kong Yaozhu; The "Bai" twin group from Singapore, BY2, is composed of elder sister Bai and elder sister. Tsinghua Xueba's Sister Flowers, which is popular on the Internet; Twin sisters Sandy and Mandy； in Taiwan Province Province; It also means finding sisters, girlfriends and best friends, such as Christine, Wu Peici and other actresses. These sisters not only support each other at work, but also often share their feelings. Such sisters may get together, watch TV, watch movies, chat, gossip, drink, dance and so on.