chup man hinh
update test loi
man hinh
man hinh (reverse-merged from commit 651c15c84e1cea38515dfd0c2409cb8ef79fc671)
Revert "man hinh (reverse-merged from commit 651c15c84e1cea38515dfd0c2409cb8ef79fc671)"

This reverts commit c2ca23fbfffd9eb4e6f46d5cf86597e4d8933d1c.
man hinh (reverse-merged from commit 651c15c84e1cea38515dfd0c2409cb8ef79fc671) (reverse-merged from commit c2ca23fbfffd9eb4e6f46d5cf86597e4d8933d1c)