From the English translation, what I got is
"About ALT + TAB switching
This kind of problem has been going on for a long time, no reason can be found. Is there a 1903 system image? If any, please send me an email shanyinroad@Stuff .com"
Please share the context/elaborate on your question, or share any doc you have been following related to Service Fabric, so that I can assist you. Thanks.