No, I'm not talking about the problem of Chabahar Port, the reason for the sanctions in Chabahar Port is also the reason for Ahmadinejad's opposition, China is unlikely to invest heavily in a project that is not very stable in Iran's internal opinions, even if there are no sanctions on such a large project at that time, it is difficult for you to cooperate if you have different internal opinions, the risk is too great, energy cooperation is simple and direct, even if there is a change, the loss will be small, I am mainly talking about the issue of weapons, after the lifting of sanctions on Iranian weapons in 2020, Cheng Fei wants to sell you J-10, I even invited you to visit the J-10, but you chose Russia at that time, and we support you now because we have really seen your hardships, and we have empathy, but now it is not realistic for you to form an air defense and air force in a short period of time, and the construction of an air force system and air defense system is very time-consuming, at least three to five years, so now what you lack is not anyone's help, but to persevere, to find a way to break the situation, even if you are given planes, you can't form combat effectiveness, the current problem is to survive the difficulties, As for cooperation, it depends on which direction you go in the future, in fact, I think it would be better if the Iranian upper echelons gave up their illusions about developing unilateral relations with one side of the party, and it is difficult for Iran to develop multilateral relations at present, and your internal contradictions are still a bit risky