These two postcards were launched by Shanghai DongMing Brewing Co., Ltd. In the summer of 2020. They are mainly used to promote the traditional winemaking culture of Shanghai Chongming Island. The font design is inspired by old-fashioned Shanghai-style artistic characters. Chongming Island is the world's largest alluvial island. The island also has a bird sanctuary. Although it is a brewing company, the locals believe that good rice wine can be brewed only when the ecology is good.