Trade in services between the US and China
Table 2.2 of https://www.bea.gov/scb/pdf/2017/10-October/1017-international-services-tables.pdf suggests 


US exports of services to China in 2016 worth $\$54$bn and 
US imports of services from China in 2016 worth $\$16$bn


Later parts of table 2.2 give a breakdown of types of services.  Travel (for all purposes including education) - which should not include transport - seems to be a large part of US exports of services to China