Job discrimination is widespread, mainly in industries with harsh environments, high labor intensity, low skill requirements, and low wages. I have worked as a construction worker myself and am familiar with all the hidden rules. We get up early and stay up late every day, seeing the stars at both ends, and work for more than ten hours at a time. Not only is the labor intensity high, but the food is also very poor. In order to save time and improve efficiency, we have to live on the construction site, which is dark and humid, where mosquitoes and flies are rampant, and rats are rampant. Once you catch a cold, you don’t dare to rest. You take a few pills and carry it. How can you dare to rest? Once the leader finds out, he is likely to be fired, and the family's life will be in doubt. The dust on the construction site is flying, the noise is deafening, and dangers are everywhere. From minor injuries to hands and feet to electric shock, falling objects from high altitudes often threaten the safety of construction workers. In severe cases, the machine may be injured or a person may lose his footing and fall. Casualties on construction sites are not unusual at all. I have witnessed too many work-related injuries. Once a work-related injury occurs, the employers blame each other and blame each other. Since most construction workers are migrant workers hired temporarily and generally do not have labor contracts, it is very difficult to protect their rights. I was often yelled at by my boss when I was working, and I had no choice but to swallow it in order to make a living. Construction workers mostly live at the bottom of society, with poor family conditions. Most of them are the second or even third generation poor. They have no education and lack any skills. Who would be willing to work on a construction site if they are not forced by life? Due to the harsh living environment, most people age prematurely and are covered with diseases. Severe physical overdraft makes them lose their labor force very early. Poverty, disease, and social indifference and discrimination ruthlessly destroy their bodies and minds. We call on the society to pay more attention to these workers. When people enjoy the beautiful living conditions, do they think of these weather-beaten builders?