Notes for reading in assembly language (1) -- Differences Between segment register DS and CS

CS is the segment address of the current Command executed by the value CPU, and DS is the segment address where data starts.

In general, CS tells the CPU where to find the content and use it as an instruction for execution,
DS tells the CPU where the content is used as data, and the difference can be known using their extensions:

Datastring = DS
Codestring = cs

The data used by the CPU to execute commands in CS may be stored in DS.
You can put the data in CS, but the CPU does not use it as data. You can also put the command in DS, but the CPU does not read the command in DS.