As we sipped tea in his office after our tour, we chatted about why the United States was then mired in production difficulties, unable to make much of the personal protective equipment that people wanted. âAmerican manufacturers constantly asked themselves whether making masks and cotton swabs was part of their âcore competence.â Most of them decided not.â He put down his teacup and looked at me. âChinese companies decided that making money is their core competence, therefore they go and make masks, or whatever else the market needs.