At Shunfa Auto Repair, Gao Shiqiang rigidly adheres to the rule that the left front wheel must be five centimeters away from the yellow line, causing work to stop in a huff when his apprentice misses by one centimeter. Zhao Donghe visits to deliver a car, skillfully repairs the faulty vehicle, and reorganizes the schedule to complete eighteen repairs. Later, it is discovered that the repair parts supplied by Gao Shiqiang's cousin's business, Xingda Auto Parts, have a high return rate, prompting Gao Shiqiang to take his apprentice and resign. After moving to Hongyuan, he still insists on making every decision himself, with the workshop waiting on him for everything, leading to another position adjustment and his resignation once more.