Size is less than 1cm
珀蝽 Plautia fimbriata.
Size is about 1.5cm
A Photographic Guide to Hong Kong Insects 香港昆蟲圖典 1st Edition 2014 P.214 - Hong Kong Entomological Society
幻紫斑蛺蝶 雌蝶 (Hypolimnas bolina kezia) A big Great Egg Fly Female
Insects (from Latin insectum, a calque of Greek ἔντομον , "cut into sections") are a class of invertebrates within the arthropod phylum that have a chitinous exoskeleton, a three-part body (head, thorax and abdomen), three pairs of jointed legs, compound eyes and one pair of antennae. They are among the most diverse groups of animals on the planet, including more than a million described species and representing more than half of all known living organisms. The...