Hello Zhao.dongb
According to Brother: the Brother promotion "CashBack" was running until 31.12.2019. Devices that were sold until 31.12. can claim the credit from Brother up to 30 days after the purchase.
From 01.01.2020 until 31.03.2020 the promotion "Switch Reward" is running. For details on Brother promotions, see here: https://www.brother.ch/de-ch...
Greetings

The change premium (foreign brand) goes from 01.01.2020 to 31.03.0202: https://www.brother.ch/-...