为什么组装＆＃34; mov si，bl＆＃34;不会工作？

Question

INCLUDE Irvine32.inc

.data
.code

main proc

  mov bh, 5
  mov bl, 3

  add bl, bh  
  mov si, bl  ; Why this wont work? How I store something in si?

  invoke ExitProcess, 0

main endp
end main