requirement: RT tickets in/out of China?

Hi -- We are US citizens seeking a 90 day 2-entry or multi-entry visa with the following itinerary:
Bali to Beijing (one way airplane tix)
Beijing to Tokyo (one way airplane tix)
Osaka to Shanghai by ferry (one way ferry tix - not purchased yet)
Shanghai to Guilin/Yangshuo (one way train tix - not purchased)
Guilin to HK?
Question 1: The application requires a copy of the "round-trip ticket", can we just give them a copy of our flight to Beijing and our flight to Tokyo? Or do we have to give them our full itinerary in order to get a 2 entry or multi-entry?
Question 2: If we need to give them our full itinerary, do we have to buy a ticket to HK (more expensive) to show we are leaving the country or can we give them a copy of a ticket from Guilin to Shenzhen and explain that we will take a bus to HK?