Why was Maotai in Tian Fei so controversial in 2007?

Hello, I would like to ask why Tian Fei Maotai was so controversial in 2007. In 2007, Tian Fei Maotai was controversial because of its price. Because the price of Maotai in Tian Fei in 2007 was the weather vane of China liquor, how much and when Maotai rose not only became the focus of speculators' divination and attention, but also became a hot topic for people who ate melons after meals.