Hi Zhiming,
Glad I could be of some help. I see that you are a big fan of GO and Meissen, like me. Automatic movement is sometimes a "turn-off" for me, too. 38mm is just about right for my small wrist, while 40mm (Senator Meissen) may be over the limit. I realize that they do not advertise this particular model for some reason, so I guess that it is not known widely yet. This piece is great for someone like me who prefer white metal and at the same time is a big fan of Meissen.....
Since you seem to be in the tri-state area, we may meet someday somewhere.
Best,
Ken