How to apply for the Beijing 144 visa free at Terminal 1?

I arrive in Oct. 5th from the USA using Hainan Airline with a stop over and change plane at Chengdu so we will arrive at Terminal 1. I carry US passport and will stay in the city for 2 days before going to Tianjin port for an Asia Cruise (Royal Caribbean). I know we are qualified for the 144 hours Visa Free exemption but I don't see a direction for the office or booth to get this Visa at terminal 1. I know they are at Terminal 2 and 3 so do I need to walk to terminal 2 for this or there is one at terminal 1?

Thanks