ID suggested by treegrow, hand by BrianGratwicke.
中華大刀螳 Chinese Mantis (Tenodera sinensis) Saussure 1871
Mantis of Hong kong 香港螳螂 (1st edition) - 饒戈 葉朝霞 植兆麟 Jul 2013 - p.46
The Chinese Mantis (Tenodera sinensis) is a species of praying mantis native to China. Around 1895 the species was imported to North America for biological pest control. Tenodera sinensis often is erroneously referred to as Tenodera aridifolia sinensis because it was at first described as a subspecies of Tenodera aridifolia, but Tenodera sinensis is now established as a full species.