In fact, it is really not suitable to wear a vest at ordinary times, but if ini must wear it, you can wear a gray long-sleeved shirt with folded sleeves and unbuttoned buttons, which is a little more casual. Wear dark pants or jeans. Wear Martin boots for shoes.
Don't do this in the picture, it's the waiter. You can visit the Lion Boys in Weibo, where there are many competitions. Besides, the blogger trusts him privately, and he will give you advice on clothes matching.