They're all legal tender. 1 HKD and 1 CHY are approximately worth the same and about $.15/each. You've got HK$18 and 0.6 CHY.
Other than that, they are modern coins that sre still being issued, so not too valuable. Can't see any error of any sort.
Other than that, they are modern coins that sre still being issued, so not too valuable. Can't see any error of any sort.





















