The nature of travel retail and its related channels are highly promotional and tactically driven, and do not provide any sort of differentiated brand experience from an online touchpoint perspective.
Duty-free shopping in China primarily happens through state-owned enterprises (such as China Duty Free), brands lack a direct relationship with their duty-free shoppers.
Consumer & behavioral data through these touchpoints have always proved to be a black hole, held by retailers and not shared with brands.
Poor shopping experience: the boom of travel to Hainan is resulted in heavily overcrowded physical stores. Long checkout queues, hard to consult sales staff, out-of-stock issues, etc.