Effective from now to Feb 28 2017, for every TWD 100 spent when booking any hotels at HRS and China Airlines dedicated website, you are entitled to gain 7 bonus miles.
If you book and stay hotels in Europe, you will automatically earn double mileage, 10 mileage for every TWD 100 spent.
Meanwhile, for 6 accumulative nights and more, you are entitled to gain extra 200 bonus miles. Kind reminder that enter your China Airlines membership number when booking the hotel.