Bing Lang chews is common among labour class people, but in Taiwan we are really discouraging people to consume them, because it can cause cancer in the long term.
Can´t believe he gave you Bing Lang haha. I live in Taiwan and never tried it. It's really unhealthy and bad for you. The situation is similar as if you go to Spain to do an interview and they invite you to do a line of speed.
Loved the video! But I wanted to say as on a health note: bing lang is a horrible habit to get into and it's not at all like coffee. It's essentially the Taiwan version of chewing tobacco and it's the cause of most oral cancer on the island. Not exactly sure why this coach is telling you it's some kind of delicacy, but the only people that really use it are those in the blue collar or labor industry.
Do weightlifters not need a relatively strict diet? I'm taiwanese american and they're eating greasy high carb(delicious!) restaurant food XD I guess where you are in the weight class matters. Along with supplementation.