These four enterprises should all be large state-owned enterprises and old enterprises. Relatively speaking, the benefits of undergraduates are similar. How hard is it? Most of the latter three companies work in refineries after distribution. Generally speaking, we should start from the workshop first, and then look at our ability after working for a few years. Kunlun gas is not very good, but we have to start from the grassroots. Of these four, I suggest you look at the workplace that suits you first. Which do you prefer, Daqing, Harbin or Liaoyang? The work is the same.