Nepali tea teas like green tea, oolong tea, white tea and hand rolled tea fall under the category of orthodox tea. In Nepal, orthodox tea is produced and processed in the mountainous regions of Nepal at an altitude ranging from 3,000 – 7,000 feet above the sea level. There are six major districts, primarily in the eastern regions of Nepal that are known for producing quality orthodox tea, which are Ilam, Panchthar, Dhankuta, Terhathum, Sindhulpalchok and Kaski. Orthodox tea in Nepal is characterized by four flushes:- Crush, tear, curl (CTC) tea is a method of processing Assam variety "(Camellia sinensis" var. "assamica)",
Assam tea provide him with samples of the leaves and seeds, which he planned to have scientifically examined. Robert Bruce died shortly thereafter, without having seen the plant properly classified. It was not until the early 1830s that Robert’s brother, Charles, arranged for a few leaves from the Assam tea bush to be sent to the botanical gardens in Calcutta for proper examination. There, the plant was finally identified as a variety of tea, or "Camellia sinensis" var "assamica", but different from the Chinese version ("Camellia sinensis" var. "sinensis"). The intervention of the colonizing British East India Company was realised through a