麻副县长不做实地考察，不负责任地下达开现场会的命令，了解到双孢菇滞销的事实后，仍然粉饰太平，向上级隐瞒实际情况。为了防止李家的悲剧重演，在蘑菇滞销的压力下，凌一农带着手下分成几个小组，去全国各地跑销路，拒绝参加现场会。麻副县长用仕途前景来胁迫、诱惑得福，让他代替凌一农做现场会上的经验介绍。得福面临着坚守信念走“独木桥”，还是听从麻副县长的安排走仕途“高速路”的选择，白校长为他指点了迷津，独木桥有令人谨慎的好处，而高速路容易出麻痹大意的事故，得福横下心选择看了前者。
Deputy County Magistrate Ma did not conduct a field investigation and irresponsibly issued an order to hold a field meeting. After learning that Agaricus bisporus was unsalable, he still whitewashed the situation and concealed the actual situation from his superiors. In order to prevent the tragedy of the Li family from happening again, under the pressure of unsalable mushrooms, Ling Yinong led his men to divide into several groups and went to various parts of the country to find sales channels, refusing to attend the field meeting. Deputy County Magistrate Ma used the prospect of official career to coerce and tempt Defu to replace Ling Yinong to introduce his experience at the field meeting. Defu was faced with the choice of sticking to his beliefs and walking on the "single-plank bridge" or obeying the arrangement of Deputy County Magistrate Ma and taking the "highway" of official career. Principal Bai pointed out the way for him.
