TWO UNDERGLAZE-BLUE AND COPPER-RED CELADON-GROUND VASES, gu, one painted and lightly moulded on the central section with two chilong, the flaring foot with a riverscape scene, the tall flaring neck with a further landscape with buildings and figures, the other vase with a similar design (one with restoration), one with a Kangxi six-character mark and of the period, the other with a Chenghua six-character mark, both Kangxi