Being that you're in HK, your likely best choice is the SLZB-06 [not the 06M]. Note, although it does support WiFi in addition to Ethernet, the use of WiFi is not recommended by Z2M [the problem is not specific to Z2M, they just have the better documentation/explanation of why] (source: https://www.facebook.com/groups/HomeAssistant/permalink/3695417697396240/)