Mangosteen chicken salad: secret to revenue of $4,000 per day

For nearly a month, a shop in Hanoi has sold over 400 servings of his mangosteen chicken salad daily, earning more than $4,000 each day.

Source: VNExpress International,
https://e.vnexpress.net/news/food/mangosteen-chicken-salad-secret-to-revenue-of-4000-per-day-4609236.html