$PI So many countries, so many languages, different cultures, different exchange rates, you can't just think about your petty gains. The doctor considers the bigger picture, thinking about the future of tens of millions of ordinary pioneers and a good explanation. The most difficult part of the project is laying a solid foundation; business owners who have done business know that the beginning is the hardest, and everything goes smoothly afterward. Managing a few people is already a headache, let alone so many.