Hi, new to this group, and I realize this thread is old, but has someone tried this offset file in China? Does it work? I'm traveling to China more and more for work, and I'm contemplating getting a gps device just address this gps offset there. In most trips I've done, Google maps on my phone seems to work great, but last year this offset appeared when I arrived in Shanghai, even though it had worked fine the day before in Beijing.
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