Dear Paloma Omegna Seitz,
Thanks for contacting Top China Travel!
There are quite a lot flights from San Diego to Beijing, and Shanghai. If you want to travel China, you can first arrive at Beijing or Shanghai to start your tour.
And We have many tours package including the destinations you mentioned above, such as 8 Days Clasic China Tour, 9 Days Chinese Spring Festival Tour, 9 Days Chian Elite Budget Tour, and so on. If you are interested in any one of them, we can arrange it for you, if you could let us know:
1. How many people will travel together, and for how long?
2. Which kinds of hotels do you prefer?
Any further request or question, please feel free to contact with us.