My country is not included in the 45 country list for a 72 hour visa free transit, what should I do?

I am going to San Francisco this year to tour and I have a 6 hour lay over at Shanghai, China. I am from the Philippines and my country is not included in the 45 countries for a 72-hour visa free transit. What can I do to be able to tour around this city for less than 6 hours? Thanks