Close friend, old friend, best friend, stone friend, regular friend.
1. Close friend
Definition: A friend with a particularly deep friendship: a close relative~.
Quotation and explanation: Lao She's "Camel Xiangzi" 17: "It is not easy for women to make friends, but they are quick to make friends; within a few days, they have become close friends."
2. Old friends
Definition: Friends who have known each other for many years.
Quotation explanation: Yu Dafu's "Chi Osmanthus": "It was because of this marriage that I went to the city to buy things, and only then did I discover the existence of your old friend, whom I haven't seen for many years."
p>3. Best Friend
Definition: A very close friend.
Citation explanation: Chapter 1 of Zou Taofen's "Remaining Life in Trouble": "After I went abroad, the "Life" weekly was closed, and my close friend Mr. Du Chongyuan then founded the "New Life" weekly."
4. Friends
Definition: Friends whose friendship is as strong as gold and stone.
Citation explanation: Song Dynasty Huang Tingjian's "Second Rhyme Reward Liu Jingwen Seeing Mail on the River": "Treasuring sentimentality is only a good friend, and asking Qianlang for thinking about good sentences."
Vernacular interpretation: Cherishing sentimentality is only a good friend. Friend, think of a good sentence and ask him quietly.
5. Suyou
Definition: A friend with a true and pure friendship; an old friend.
Citation explanation: One of "Ci Yun Repays Wu Zhenxi" by Sun Hua of the Qing and Tang Dynasties: "Dare to gather with Ren Fang in Lantai, and we are friends who have come together to take over."
Vernacular interpretation: Dare to join Ren Fang. At Julantai, my friends usually come to pick me up.