I am about to book a fairly simplistic routing for business class RTW. Route I would like is:
LHR-BKK-HK-PEK-NRT(i guess connecting in HK)-Washington-tpa-lgw.

All seems fine except my agent is telling me the HK-Beijing route is not covered on the oneworld routing. I show it as a CX daily flight however my agent says its a code share with dragon air and is not included.Therefore i have to buy a hk-pek return.

Is that right?

Also as an aside if i wanted to additionally visit shanghai and Xian is there a air pass i should consider?

Many thanks.