Calling an expert means knowing the market very well. Now it refers to teasing between friends, which is often used for joking and teasing between friends. Lu Hua Peanut is a catchy brainwashing advertisement of Lu Hua Peanut Oil, which later became a stalk on the Internet. So what Lu Hua Peanut Zhihu connoisseur means is that a friend teased you.

Stem is an incorrect word in network language, which means joke, foreshadowing, or something with special meaning or irony. It often exists in variety shows and networks, and it also appears from time to time in daily life.