Where is San Francisco?

Where is San Francisco?

David was referred in my post "Why We Speak in Different Language", yes, the guy came from the United States. He left here at 5 am this morning, he may sit at home in the city of San Francisco now. I want to know more about this elder guy, who doesn't care how much time he spent on studying Taiji, and he really loves it.

I talked with David by using my poor English in the park during practicing Taiji, he studied several years here, but he didn't tell me the exact numbers, just more than five years. I don't ask his full name, for usually we talked little, we practiced with different man, also i was a beginner and David was good enough.

Where is San Francisco? The elder man comes from the remote city, he comes and studies in YuanDadu Relics Park every year. This time he stayed about three weeks, had a wonderful time here, for the city is his home, he can't stay here too long.