Three cups, China. 1x round cup with circumferential

Three cups, China. 1x round cup with circumferential decor in cobalt blue with rocks, bamboo, flowers and bird, old hairline crack, under the ground a somewhat blurred mark (probably Chenghua), H. 5, 1x hexagonal, all 6 sides with different motifs in cobalt blue, underneath a Ying-Yang mark in concentric double rings, H. 4 / Ø 5.5 cm, probably Kangxi 17/18th C., 1x octagonal with enamel in iron red and green, H. 3 / Ø 5.5 cm