ReSpeaker Core Crashes Piano Fruit

A technical inquiry from FB as follows:
屏幕快照 2018-05-11 上午9.21.57.jpg
屏幕快照 2018-05-11 上午9.18.05.png

Hi lily:

Please refer to http://wiki.seeedstudio.com/ReSpeaker_Core/#faq,Q20: System recovery by factory image., if not, please look at it http://wiki.seeedstudio.com/ReSpeaker_Core/#faq,Q2: How to Rescue from a failed upgrade?