The competitiveness is declining. According to the information of Master Kong official website, the products similar to Jinliang iced black tea on the market are rich and varied, and consumers have rich choices, which leads to the decline of the competitiveness of the drink, so the production is stopped. Iced black tea, that is, a drink made of black tea with ice, has no way to prove the exact invention time, but it suddenly became popular in the summer of 1929.