Which leaf used for making a popular beverage was first discovered by the Chinese?

The leaf used for making a popular beverage that was first discovered by the Chinese is the tea leaf. Tea leaves come from the Camellia sinensis plant, and they have been used in China for centuries to make a variety of teas, including green tea, black tea, and oolong tea. The Chinese were the first to discover the medicinal properties of tea leaves, and they began using them for medicinal purposes around 2700 BC. They also began to use tea leaves as a beverage around this time, and tea drinking soon spread throughout China and eventually to the rest of the world.