We have not solidified our hotel arrangements yet. Do we have to list all hotels & exact dates?

My American son lives in Beijing right now. We will be staying with him in his apartment for the first few days of our trip, but then plan to travel for several weeks after that, utilizing sleeper trains for some of the overnights. We have not made hotel arrangments anywhere yet. Can I just list my son's apartment address and phone number in Section 2.5 of the application form?

Would Section 2.8 and 2.9 of the Visa Application be applicable to me?