1.https://www.marketwatch.com/story/are-we-heading-for-an-amazon-alibaba-e-commerce-showdown-2018-02-02

2.https://www.youtube.com/watch?v=gk69hV6LEgI

3.http://projects.wsj.com/alibaba/

4.https://www.chinainternetwatch.com/7771/alibaba-amazon/

5.http://www.keywordlister.com/cHJvZHVjdCBhbWF6b24/

6.https://www.cbinsights.com/research/amazon-alibaba-international-expansion/

7.http://www.iresearchchina.com/content/details7_38214.html

8.https://www.statista.com/statistics/788109/amazon-retail-market-share-usa/

9. https://seekingalpha.com/article/2205963-i-hitched-my-wagon-to-yahoo-on-alibabas-ipo

10.