Ali's levels can be simply considered as P series and M series. Because Alibaba started from B2B, it needed to manage a large number of sales at that time, so it established a strong and leading management system, which is the M series. With the increasing importance of technology, the M series is no longer open to middle and lower-level employees, so generally they take the P series, that is, the "technology" route. The technology here refers to general technology and professional ability, not computers. So sales can also be P, and those who work in products, operations, and marketing can also be P.