When the car landed, Zhang Ming brought a bucket of engine oil from the warehouse, opened it and added it from the oil filler, a light yellow liquid, which was a bit like foreign honey. Zhang Ming finished adding and gave him an empty bucket, he took the empty bucket in one hand and the black and slimy waste engine oil out of the workshop, came to the garbage heap, turned the oil barrel upside down, and the new engine oil dripped out and fell into the black and slimy waste oil. Tick, tick, stir up the black waves, catch a little oil and rub it so smooth, he laughed and said to himself, this oil goes in, and when it comes out, it changes, just like the cherry that goes in from the mouth and changes when it comes out. However, he knew that the engine oil was like a public relations lady, caught in the middle and endured.

The waste engine oil was loaded into the iron drum, he entered the workshop and looked carefully at the car cabin, the engine was running, only to see the pulley turning, how to rotate inside can not be seen, it is amazing. If we think back to the working principle of the internal combustion engine, we can understand that the gas expansion pushes the piston to move in a linear line and turn it into a crankshaft rotation motion? He was still standing pondering, and the master smiled and asked, "Fang Qiang, do you miss your sister?" He smiled and said, "Master, when I enter the workshop, I want to drive, and when I leave the workshop, I don't know if I want my sister." Zhao Yun patted him on the shoulder and said, "Are they all men, just think about women, or the woman will come to the world for nothing."

After the vehicle was maintained, he followed Zhang Ming into the toilet and urinated on the pool, Zhang Ming said, "How do you feel?" He smiled and said, "Very good." Zhang Ming smiled and said okay, squinted at his urine, and said, "I haven't looked carefully, your cow is not small." He listened and laughed and said, "It's all men, don't make a show?" He came over after sprinkling the water and said, "Have you washed your hands?" When he asked like this, he forgot about it, Zhang Ming smiled and said, didn't the master tell you, the engine oil is sticky and slippery. He looked down and sure enough, there was black engine oil on it, and he said, "Go get me some paper to wipe it on." Zhang Ming smiled and left, and soon came back, holding a cigarette box in his hand, tearing gold paper for him, he got angry when he saw it and said, "Stupid, that doesn't absorb oil, find some newspapers." Zhang Ming said with a smile: "The newspaper is in the boss's office, and I can't get in." He shook his head and said, "Why did you forget it?"