As I can see, HE does have a GE to HKIX. However, nearly no prefix is announced but just tunnelbroker servers. Not even their anycasted DNS which does have a node in Hongkong. It will be GREAT to have prefix, or at least, your recurrsive DNS to be announced to HKIX.
Prob best to send a request like this to IPv6@he.net and mebbe they'll work some BGP magic for ya.