Chai Kiln was the imperial kiln of Zhou Shizong Chai Rong, the emperor of the Five Dynasties and Ten Kingdoms. According to records, the Chai kiln was established in the early years of Xiande in the Later Zhou Dynasty of the Five Dynasties. The porcelain produced by the Chai kiln is "as green as the sky, as clear as a mirror, as thin as paper, as loud as a bell, moist and delicate with fine lines." The exquisite craftsmanship is unparalleled, and it is the best among many kilns at that time.

This paper hammer bottle has a total height of 22.4 centimeters, a diameter of 4.4 centimeters, and a bottom diameter of 8.6 centimeters. Round mouth slightly luxurious, with embedded copper buckle, slender neck, sloping shoulders, cylindrical belly, flat bottom without feet. The entire vessel is coated with sky blue glaze, and there are five small burn marks on the outsole. A circle of glaze has been removed from the bottom and coated with brown juice, revealing a yellowish color in the center, which may be caused by a cushion mark. The bottom of the paper hammer bottle is engraved with a poem by Emperor Qianlong titled 'Ru Kiln Pink Green Offering Hua Paper Hammer Bottle'. This cultural relic was produced in the second half of the 11th century to the early 12th century of the Northern Song Dynasty and is classified as a national treasure. It is currently housed in the National Palace Museum in Taipei.