How to get from Beijing Capital Airport T3 C departures on 3rd floor to T3 C arrivals on 2nd floor?

I'm meeting my partner in PEK. He will arrive at T2 international arrivals. I am in China already and will arrive in PEK at T3 domestic arrivals.

I suggested he catch the free shuttle bus to T3 when he arrives to meet me but this bus will take him to the 3rd floor departures not 2nd floor arrivals (where I will be). Will he be able to get from the 3rd floor to 2nd floor easily at T3 C?

Thanks