First, don't contract the earthwork project easily. You can't predict the earth beneath the earth. If someone calls you to dig in, you may have to toss a day.
Second, due to the relatively short construction period of small-scale construction machinery, it is necessary to look at each other before each construction. It is worth noting that tossing for two hours a day.
Third, machines operating in the country have higher profits than cities.
Fourth, in the mountainous area, it is necessary to have a machine equipped with a broken hammer. Some of them work on the basis of excavation. They cannot do without a hammer and have their own advantages.