Archway ingots are also known as silver and saddle ingots, which are named for their resemblance to the ancient archway architecture. It was cast in the qing dynasty guangxu and xuanqing period, which lasted more than 30 years.The foundry ingots are mainly in kunming, and are spread throughout the territory, and are spread through trade with neighbouring countries, as well as in Vietnam, Thailand, myanmar, Cambodia and so on. It is widely used in the trade of tea, tobacco, opium, etc., as the standard currency for trade in yunnan and neighboring countries. According to the literature: "pay taxes on the official, trade in the city, the public estimation of the ingot".

The arch is an irregular rectangle, usually about 5.9 centimeters long, about 3.5 centimeters wide, about 1.5 centimeters high, and the weight is usually about five or two, about 180 grams. Its production is exquisite, the modelling is exquisite, inscriptions more regularly arranged orderly in more than three cross, for all previous dynasties silver treasure, not only has the value of real gold and silver effect, and has art appreciation value and high research value of cultural relics, have particular vision by many collectors, due to the early years of the republic of China, the implementation of the "waste two gaiyuan" arch after stop flow, a lot of pin melting, the folk world amount is not big, but collectors, there is a great appreciation potential.