Meaning: An expert refers to a person who has rich knowledge and experience in a certain thing or work. Doorways, tricks and methods of doing things. A layman refers to a person who has no understanding or experience of something or a job. The whole meaning is: insiders mainly look at the way and essence of things, while laymen can only look at the appearance and excitement.
Source: Liu and other "Dragon Cases" seven or five times: "As the saying goes:' The layman watches the excitement and the expert watches the doorway. "In the crowd of onlookers, some experts secretly admire the parents' superb martial arts."
Extended data:
Quote: Ding Ling's Miscellaneous Notes on Three Days IV: "Today, let's have a competition to see who can spin home textiles quickly and evenly. If you want to spin well, you must pay attention to the car and the doorway. " ?
Quote: Jiang Zilong's "Director Joe II": "The layman looks at the excitement, and the expert looks at the doorway."
For example, there are doorways to keep fit in autumn. Early to bed and early to rise is suitable for the season. Lung qi stretches the body, autumn wind and autumn rain do not worry about autumn, and cold diet should be reduced.
Other meaning: The aisle inside the door.
References:
Baidu Encyclopedia-layman watching the excitement, expert watching the doorway