Following earlier releases of “Ancient Chinese Paintings from the National Palace Museum Postage Stamps — 24 Solar Terms” Autumn and Winter in 2022 as well as Spring in 2023, Chunghwa Post has issued the fourth set of stamps drawn from the Ink Marvels from a Forest of Pearls (Ⅳ) by Zhang Ruoai of the Qing dynasty, a work held in the National Palace Museum. The fourth set contains six stamps, each valued at NT$ 12, depicting summer with its six solar terms: Beginning of Summer, Lesser Fullness, Grain in Ear, Summer Solstice, Lesser Heat, and Greater Heat. The six stamps are in a se-tenant block and the shaped perforations are at the center of the long sides of the stamps. The Ink Marvels from a Forest of Pearls is a collection of large paintings gathered into twelve albums in the time of the Qianlong Emperor. The albums are named after the Twelve Terrestrial Branches, the fourth album being entrusted to Zhang Ruoai, who painted the 24 solar terms and expressed each term by landscape painting. The paintings use the styles of the ancient masters to express the climate, show customary activities and the state of the natural world, and depict the variations proper to the given term.