Located on Mt. Bagua, “Ok Tea Co., Inc.” combines traditional tea with modern tea-making process to provide consumers with the “purest” tea. * Reduces the release of tea tannins to prevent astringent taste and strengthen sweetness. When cold-brewed, the sweet amino acids in tea leaves are dissolved first, while the source of bitter and astringent taste such as tannin and caffeine are prevented from being released. * Decreases caffeine content to alleviate burden on the stomach wall. People suffering from upset stomach after drinking tea can drink cold-brewed tea to avoid the problem. The low caffeine content also improves poor sleep quality caused by drinking tea.