Eat more meat, but don't eat ready-made, which is full of carbohydrates and has no nutrition. Buy raw meat and cook it yourself, preferably beef.
If it is ready-made, remember to look at the ingredient list on the packaging bag. Buy only pure meat without starch.
When you go to the gym, ask the coach which movements are most effective for practicing your arms. You'd better pinch your arms twice and a half to three times.
Height1.75m, weight 78KG. Personally think it is the best. Of course, I have to practice my style.
1 m 8 or so, weighing 85KG, neither thin nor fat.