From a legal standpoint: an NDA is an agreement - something contractual, and therefore is not limited (by law) to any specific jurisdiction. So, you can select Delaware or California, or India for that matter. From the business aspect, the best jurisdiction to select would depend on: 1. Jurisdic...
The HKG company has the same commercial law set of UK, that said, between the two it would be safer using an NDA fitting the latter.