It was formalized and professionalized, but it was restricted to specific roles and generally applied in pursuit of commercial goals rather than being used intuitively, as Florence Nightingale, Blackbeard and Ying Zheng had done.
它变得正式和专业， 但也受到了局限， 它被普遍地用于商业追求， 而不是被自然地使用， 就像被弗洛伦斯·南丁格尔，黑胡子，和嬴政的做法一样。