What are some short idioms that praise the deep affection between brothers and sisters?

1, brotherhood

Pinyin: qingtóngshüuzú

Explanation: Brother: Metaphorically speaking, brother. Deep friendship, as close as brothers.

Source: Tang Lihua's "Hanging the Ancient Battlefield": "Who has no brothers?"

Step 2 be intimate

Pinyin: q and nm√wúJian

Explanation: space: gap. Close relationship, no barriers. Describe very close, without any barriers.

Source: "History of Han Xiao Chuan": "Xiao was in a similar position before his death. With the help of his master, it can be said that his loved ones died. When it comes to finding a way out, it is a pity that the structure is evil and the pawn wins the official plan! "