It is SOLVED!
Install this and restart X.
gvfs.tgz
http://4275.com/epabik
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I found the pcmanfm pet from here, it is very wonderful:
viewtopic.php?p=135322#p135322
The pet works on EasyOS Daedalus-series version 6.6.3 too, but it can't access the network(smb://...):
Another pcmanfm from petget:
Why? Some thing missing on easyos?