Functionalization refers to the supply of series products with different functional combinations based on the core functions of the products, the increase of some functions into high-end products, the decrease of some functions into medium and low-end products, so as to meet the consumption habits and economic tolerance of different customers. The key is to form the super production capacity of the core functions of the products, and at the same time take into account the development needs of the extended functions and the additional functions, so as to win the favor of the subdivided customer group with the unique function combination.