This popular salad is there in many Chinese and Korean menus. You can make it quite easily at home.
You can reduce the number of red chili peppers if you don't want it spicy. You can also deseed it to reduce the spiciness.
If you do not have Chinese black vinegar on hand, you can add rice vinegar or rice wine vinegar instead. Chinese black vinegar has a malty, smoky flavor; so you can also try adding balsamic vinegar but omit the sugar to avoid the salad from becoming too sweet.