In keeping with the theme of "Ecology Day" on the second day of the TAIPEI 2015 - 30th Asian International Stamp Exhibition, Chunghwa Post is proud to launch a set of two stamps, themed "Our Ecosystem." The set of stamps is designed with a se-tenant block. The designs follow:1. NT$10 stamp: Zengwen River estuary wetlands sit by the mouth of the river, where the waters empty into the sea. The abundance of nutritive salts brought from the upstream area has made the wetlands a habitat for a diversity of wildlife. The most notable species of all is the black-faced spoonbills. Their long, flat bills bear a striking resemblance to pipa, a traditional Chinese musical instrument. They winter here in the wetlands every October. 2. NT$25 stamp: Sicao wetlands sit at the convergence point of Zengwen River, Luermen River, Yanshui River and Jianan Canal. Large quantities of silt from the upstream area amassed over the years have formed a large plot of tidal land in the Taijiang Inland Sea. The area, with its plentiful food resource, has attracted an impressive array of sandpipers and plovers. The very leggy black-winged stilts are also the frequent faces here. Within the wetlands is a green tunnel, shade on both sides by mangrove trees, and the view is picture-perfect.