Hello Xiaoping,
I am Karina and l’ve been living in Vienna for ten years now. l am since 2012 an experienced host from my apartment in Buenos Aires, Argentina; it is the same case as yours: l left my hometown many years ago and needed someone who could co-host my place in this city with me, since l lived in a country overseas, namely Austria. I found her, Celia, and she is great; although l keep handling and making decisions for my listing on-line alone, Celia is there to make check-ins and -outs, to get the place ready for new guests and to be there if anything happens in between, all duties that l have done before l began to live abroad.
Now, l am looking to offer my services just as Celia is doing, here in Vienna. I live in 15. Bezirk, l speak 4 languages (spanish, english, german, italian) and would be glad to hear about you whenever you still have the need of a co-host. Here l send you a link to my listing in Buenos Aires, so you can be able to read the feed-backs of my guests:
https://www.airbnb.com/rooms/851649?location=Buenos%20Aires%2C%20Autonomous%20City%20of%20Buenos%20A...
Do not doubt to contact me for questions, would be glad to help!
All the best,
Karina