Police, cleaners, farmers, doctors, firefighters, construction workers, writers, etc. What kind of modernity and skills do they need?

Farmer: No farmers grow crops, and people in the city have no rice to eat and no food to eat. Teacher: gardener, imparting knowledge, educating children from generation to generation, and making them the pillars of talents. Traffic police: Make sure the traffic is smooth. Doctor: angels in white, heal the wounded and save the dying. Postman: It is because of them that letters can be delivered to firemen on time. Dangerous occupation, always in danger of being buried in the fire. However, in order to protect people's property from fire, they still take risks to enter the sea cleaners: humble work is indispensable, without them, our city will be messy, and our beautiful city is inseparable from their efforts. Salesman is the only seller that consumers face when shopping, and it is the bridge between manufacturers and consumers. Business is directly related to him. Actor is an indispensable profession in entertainment culture. They use acting skills to attract the audience, but they perform one virtual scene after another, reflecting the real problems. Without them, the film industry and television industry would not exist. I wrote all the above by myself, and I didn't extract any materials for reference only.