hi my order id is EV054041136CN but it says exchange station return scan and returned, i dont know what is it mean and did my order returned?

2015-12-03 12:52:07.0 international parcel shipping center received
2015-12-03 16:34:11.0 international parcel shipping center customs scan
2015-12-03 21:27:11.0 leaving international parcel shipping center ，next station 京大平面
2015-12-04 09:19:00.0 Beijing Transit Station export security scan
2015-12-04 13:51:00.0 Beijing Transit Station export customs scan (domestic transit )
2015-12-07 10:25:31.0 Guangzhou Transit Station export security scan
2015-12-07 14:44:50.0 Guangzhou Transit Station export customs cleared
2015-12-10 13:14:01.0 Guangzhou Transit Station import customs scan
2015-12-10 13:27:38.0 Guangzhou Transit Station import customs cleared (domestic transit )
2015-12-15 10:29:00.0 Beijing Transit Station import customs scan ,remark (RET,退因:39)
2015-12-16 17:19:00.0 Beijing Transit Station import customs scan ,remark (RET,退因:39)
2015-12-17 19:52:00.0 Beijing Transit Station import customs scan ,remark (RET,退因:39)
2015-12-18 16:19:00.0 Beijing Transit Station import customs scan ,remark (RET,退因:39)
2015-12-19 16:59:00.0 Beijing Transit Station import customs scan ,remark (RET,退因:39)
2015-12-20 16:08:00.0 Beijing Transit Station import customs scan ,remark (RET,退因:39)
2015-12-21 15:00:00.0 Beijing Transit Station import customs cleared (domestic transit )
2015-12-28 17:50:45.0 Beijing Transit Station export security scan

what does this means from Beijing to Guangzhou and again Guangzhou to Beijing ? and since that time there is no status update

Hello my tracking number is UM067490915CN and today it's showing the following message: Guangzhou Exchange Station] Return, None. Does this mean that my package is being returned to sender? I am in the U.S. Please help! Thank you