Uncle Wei, an old dispatcher who has worked in the sand yard for thirty years, has kept over a hundred heavy trucks running smoothly with a set of solid, practical rules. Finding the dispatcher cost of two yuan per truck uneconomical, the boss decided to stop hiring Uncle Wei and switch to an intelligent queuing system. Without Uncle Wei's on-site rules, the truck traffic in the sand yard gradually fell into disorder. Uncle Wei went to the Qingshui Sand Yard, re-established management rules, cleared the traffic flow, won customer recognition with years of skill, and secured a large-scale cooperation order. From being discarded to being valued, Uncle Wei says that only with stable rules can business last long.