Do I need China visa for going out to Xiamen for sightseeing maybe 10 hours?

I am an Indonesian passport holder with US Green card. I'm taking a Xiamen airline to go from Los Angeles to Jakarta but transit time at the city will be 12 hours to connect. Can I go out of airport for sightseeing without China Visa? And is traffic ok to go back and forth in 1 hour to city? Where should I go around in the city if I have about 10 hours time.

Thank you. AW