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I guess that it is a kind of moth.
see also Zolotuhin, V.V.; & Pinratana, A. Bro., 2005. Moths of Thailand 4 Lasiocampidae. Brothers of Saint Gabriel in Thailand, Bangkok. 205 pp.
Of the five almost identical species in the G. pardale group, only pardale has been found in Hong Kong. the observation is of the female.