Since Q4 2016 the air freight development showed a drift away from a buyer's market. Hong Kong airport has reached capacity, no further slots are available, and the new runway will only open earliest 2021. And even then, one of the existing runways will be closed down for a two year renovation.
This leads to a sustainable rate hike which in 2018 will first time apply for the full year and not only the peak.
It remains to be seen how this will affect the supply chain, whether there will be a move to other modes like rail, sea/air, or sea, a move to other airports in the vicinity, or a midterm decrease of quantities ordered in the region. GW will be ready for either.