In the early days of liberation, there was no oil in Daqing. After liberation, in order to get rid of China's oil-free hat, Li Siguang discovered oil in a certain area of ??Heilongjiang and developed it. It was later named Daqing, which means to celebrate China's getting rid of its oil-free hat. That seems to be the meaning. I am also talking nonsense. If there is any similarity, it is a coincidence.