C176 Pantograph waiting to be released

Tang Tianbao did not lose his temper. He picked up the designs he had designed yesterday and skimmed through them. He could not see any problem with the drawings. Maybe it was as Li Bo said, full of holes. Maybe there was no problem at all. It was just that Tang Tianbao didn't want to see it. His mood mysteriously slipped down to the lowest point and he didn't have any mood at all