2, midnight snack now generally refers to food in the evening, and midnight snack can be both food in the evening and time (very late).
: midnight snack refers to the meal eaten in the evening, which is the meal after dinner, and the time refers to the rest time (usually from 12 to 4 am, because 4 am is the morning tea time in Guangdong). In cities, there is almost no difference between the choice of supper and dinner, but teenagers often eat supper from the beginning to the end of their lives, which is caused by the extension of work or entertainment time.
The Song Dynasty's "Dream of Liang Lu" contains: "On New Year's Eve, the internal affairs bureau (the internal affairs office) presented night snack's fruit box, and all kinds of fine fruits were clustered (assembled) in the box: seasonal fruits, candied fruits, candied fruits and so on." "night snack" is nicknamed "midnight snack", which has existed since ancient times.
The note of "snack" in Ci Yuan says: "Cantonese night market restaurants are also called snack." This statement is inappropriate. Snack food includes porridge, noodles and sugar water. Cantonese people enjoy these foods in after-dinner afternoons, which is called "snack eating", while "night market restaurant" is the place to eat snack. Strictly speaking, the earliest "midnight snack" refers to dinner, but this dinner is not a home meal but provided by a brothel.
Overeating at midnight snack can make the stomach swell and oppress the surrounding organs. The intense work of the stomach, intestine, liver, gallbladder, pancreas and other organs after meals will send information to the brain, which will cause the brain to be active and spread to other parts of the cerebral cortex, causing insomnia. If you eat too much unreasonable and unhealthy food at night, plus less activity, the food in your stomach can't be emptied in time, and the normal life rhythm is broken, it will easily lead to insomnia.
References:
Baidu encyclopedia-snack