Important Chinese sacrifice blue-glazed porcelain Yuhuchun vase also known as sapphire blue glaze, with interior white glaze, Yongzheng and double ring mark on base of the period, with matchable natural carved hardwood stand, 9 1/4" H. Royal family used porcelain in this color to sacrifice to god of heaven. Purchased in Hong Kong in the 1990's. Provenance: from an important provate collection Wellesley, Massachusetts.