Twinings Pure Oolong Tea Bags Are Principally Sourced From The Beiyun Region In The Fujian Province In China. Oolong Teas Are Partially Oxidized Or Semi Fermented Which Occurs When The Leaves Are Gently Shaken. It Is This Process Which Gives Oolong Teas Their Reddish Appearance And Slightly Sweet Flavor, Making Them A Sort Of Hybrid Of Black And Green Teas. Great To Drink With Lunch Or In The Afternoon, This Tea Is Best Served With Milk And Sweetened To Taste.Twinings Leverages Its Rich British Heritage And Over 300 Years Of Tea Making Experience, Ethical Integrity, And Generations Of Trusted Knowledge To Push Modern Boundaries And Set Standards In Taste And Enjoyment.