在小农经济时代，有一句俗谚：肥水不流外人田，意思是凡是自己能做的决不让别人去做，以免使好处落入人家的口袋。延伸到今天一些企业的做法，也颇为相仿，如自建食堂、幼儿园、职工宿舍、车队，乃至学校、医务室等等，源头末梢业务通通自己做。邮电是传统企业更是如此，自办 In the era of small-scale peasant economy, there is a common saying: fertilizer does not flow outsiders, meaning that they can do whatever they can and should not let others do so as to avoid the benefits falling into the pocket of others. The practice extended to some enterprises today is also quite similar, such as self-built canteens, kindergartens, staff quarters, the fleet, and even schools, medical clinics, etc., the source of the end of the business all done. Post and telecommunications is even more so for traditional businesses