Why hasn't the packaging of thirteen incense in Wang Shouyi changed for so many years?

The packaging has been updated. The earliest spices were wrapped into small packages with book paper, and each package was stamped with the thirteen incense seals of Wang Shouyi.

Later, Wang Shouyi and his son founded Wang Shouyi Shisanxiang Processing Factory, and owned registered trademarks and packaging patents.

With the development of the market, the packaging design of Wang Shouyi Shisanxiang has undergone different modifications.