Simple and profound. Shallow and deep refer to the depth of water, and shallow means deep.

A short and profound funeral n]

Explanation: it means talking to people who don't have much friendship. Later, "long talk" refers to an in-depth conversation with people who have no deep friendship.

Source: The History of the Later Han Dynasty Cui Zhichuan: "It is foolish to talk about shallow things and deep things."

Example:

(1) Stone Book of the Gods: "Shallow words and deep words are forbidden by gentlemen." I'm afraid it's normal between the first meeting. ?

(2) Feng Ming Menglong's "Warning Records" Volume 32 "Qi Lu Deng", July 1: "Might as well talk about it before Shixiong."

Usage: as an attribute; Speak out of proportion.

Sentence making: Don't make friends with shallow words, and don't lose your sense of proportion.