i try to open the "mylocations.db" file with sqlitebrowser,find out that the real cordinate(in degree) for (372475068,1449302728 ) is (31.2205,121.47915) 372475068/31.2205=11930464.53 ,11930464.84 this is the FACTOR
by exporting the favorite chart into *.csv and we can transfer the cordinate to *.gpx manually.(EXCEL is needed,i am not sure whether gpsbarbel can do it or not)
If someone could make a convertion program, it would be awesome.
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