It originates in Puer Yunnan ,is a kind of dark tea .Pu'er Tea is a general term, in the bulk or pressed form, the sun-greened Yunnan grandifoliate species tea in Puer Prefecture as its raw material and fermented up to the local standard of Yunnan Province.The good Puer Tea is red-brown(the color of pig liver), with the special aged-aroma.it's different from the other tea it's More old more valuable,it will be more value along with the time .