the process of reading data at address 0x57 is data that appears in the address 0x50.
That's right, because changing the address of the chip does not change its size.
If you write 'A' into address 0 when the chip has address 0x50 and then read address 0 from the chip when it has address 0x57 you will get 'A'.
If you have more than one chip you can install them with addresses 0x50, 0x51, 0x52 and so on. Then if you write 'A' into chip 0x50 at address 0, that will not affect what is in address 0 in the chips at 0x51, 0x52 etc.