Indonesian citizen transit in Xiamen need transit visa?

I am and Indonesian citizen living in the USA under Green Card, flying to Japan from Vancouver with a 4 hours layover in Xiamen. Do I need entry permit in this condition?

My travel itinerary:
Seattle - Vancouver international aiport by bus
Vancouver - Xiamen - Japan by Xiamen airline
Japan - Xiamen - Vancouver by Xiamen airline
Vancouver - Seattle by bus