The engineering units are basically the same. I'm from China Railway 20th Bureau. The benefits of China Railway 20th Bureau No.4 Company in the past two years are OK. Five insurances and one gold are not complete. Have a pension. I have a medical insurance card this year (I choose my own city, because the unit is highly mobile, so it has little impact). There must be work-related injuries, and the housing provident fund is not clear. The food is like this. I don't like it very much. It tastes terrible! (I don't know about other places) There are no legal holidays. I'm just telling you, there are no holidays. If you want to rest, you can only ask for leave! (There is no salary during the leave period) Houses and units have bases, and there are concessions to settle down and buy houses there. Wife problem solved by yourself! There are very few girls in the unit. It's really troublesome to marry someone outside the unit and live apart! After work, you can mix in the office! That's better. This unit is not easy to mix, with many children and many related households. If you haven't mixed out in about 3 years, quit quickly!