I don't disagree but you can now get a 10-year 'multiple entry' visa for China if you're a US business person, so as long as you have a passport, you're free to

I don't disagree but you can now get a 10-year 'multiple entry' visa for China if you're a US business person, so as long as you have a passport, you're free to visit whenever you're needed. http://www.usccc.org/#!china-visa/c1nj9 http://www.usccc.org/#!china-visa/c1nj9