Update SDK_tutorial.md

Yabin Li

2023-08-21 450f42bfde6ba9641071cc5498fc77aa4efdedd3

1
2
3
4
5
6
7
8
9
x    1
xx    2
xxx    3
xl    4
l    5
lx    6
lxx    7
lxxx    8
xc    9