How do I get to Yulin from the USA?

Do you mean the Yulin in Guangxi or in Shaanxi Province? I am afraid I cannot figure out clearly.
If you mean the one in Shaanxi, you need to fly to Beijing first and then fly to Xian where you can find the trains or flights for Yulin.
If you mean the one in Guangxi, you can fly to Guangzhou first and then take long-distance bus for Yulin.

That's right,two cities was named yulin in china.Firstly,you'd better indicate the name of province.

Yes, My destination is Yulin in Guangxi Province

If so, you can fly to Guangzhou and the take airport express bus to reach local CAAC. Then you can take a taxi to reach Guangdong Provincal Bus Station where you can find bus for Yulin.

To sit directly to the ticket office of Civil Aviation Airport Line 1, get off, nearly to the Guangzhou Railway Station, Guangzhou Railway Station square is passed the provincial bus station, very close, a few minutes, is through the square! The provincial bus station 9 at the beginning of each hour to Guangxi Yulin bus, about 5 hours to Yulin, I wish you a pleasant journey.If you have a chance to come to Yunnan, maybe I can do a tour guide, Hei hei