10" Plate -This image shows a four-character reign mark, commonly found on Chinese porcelain, that reads from right to left, top to bottom as "Da Qing Qianlong" (Great Qing Qianlong). 

• The mark indicates it was designed to represent the reign of the Qianlong Emperor (1735–1796) during the Qing Dynasty. 

• Similar marks are found on various items including dishes, vases, and water jugs. 

• It is written in underglaze blue within a square border. 

• Reign marks like this are often found on the base of an object to identify its period of production.