Entomology, would anyone who studies insects please come in? What kind of insect is this?

Cockroach scientific name cockroach belongs to Insecta, Orthoptera, Cockroach.

According to your description, it should be Blattella germanica.

Latin name: Blattella germanica

Blattella germanica is mainly yellow and purplish red, much smaller than Periplaneta americana, and the smallest is as big as mung bean. Like warmth, widely distributed, fast reproduction, activity is closely related to temperature. It is most active at 24-32 degrees Celsius, and spends its larval period within 3- 12 weeks. It lives at 20-29 degrees Celsius for four to nine months, at 30 degrees Celsius for two and a half months, and can't eat anything for a month. Cockroaches reproduce very quickly. A pair of cockroaches can reproduce 20,000 after one year, and females can reproduce for life after mating once. Under normal circumstances, it can mature and lay eggs in 36-56 days, and 14-30 days can hatch small cockroaches. An egg clip can hatch 33-45 small cockroaches, but before hatching, the eggs are carried by female cockroaches, and the eggs are protected by thick eggshells, so it is difficult for general pesticides to penetrate. The solution is to kill nymphs and adults more effectively. I found them next to the drying room in a star-rated hotel, and the temperature next to the drying room was 100 degrees Celsius. In addition to the places where cockroaches usually stay, Blattella germanica will hide in various gaps in dark and humid parts of the room during the day, such as the operation room, storage room, wooden desks and cabinets. Cockroaches are used to nocturnal activities, and it is generally invisible to sleep during the day. After turning on the light at night, you will see cockroaches running around; If Blattella germanica can still be seen during the day, it shows that the population density of Blattella germanica in the environment is already high, and it also likes to move in office computers, photocopiers, power outlets and other places. There are thousands of small gaps in the bed, ceiling, window sill and treasure door of the family. It is usually hidden in some places with small gaps, such as packaging cartons. It also likes to live in warm places (such as kitchen, refrigerator, radiator and so on). ). Now some famous hotels, hotels, restaurants and office buildings in our city have their haunts, and some even climb into bed to bite guests. According to newspaper reports, Blattella germanica will burrow into the ear of guests at night and bite through their eardrums. Blattella germanica has gradually become the dominant species, and most pesticides on the market are ineffective, even if they are soaked in liquid medicine, they cannot be killed. It is estimated that it is related to the drug resistance of Blattella germanica caused by the massive use of chemicals and drug abuse by human beings. Blattella germanica has become one of the three most resistant pests in the world.