The pronunciation of the word "buy shell" is ke.
Reading clever sounds generally refers to the appearance of larger objects, such as the appearance of the earth, and reading the crust (clever).
The pronunciation of ke generally refers to relatively small objects, such as eggshells (ke)
Backdoor listing means that non-listed companies buy a certain proportion of shares of listed companies to obtain listing status, and then inject their own related businesses and assets to achieve the purpose of indirect listing.
So: read ke