China sells goods into the U.S. market easily, but American service providers face a range of barriers in China, which vary across industries.

China started 2009 weathering the global financial crisis and ends the decade battling slower economic growth and a trade war with the U.S.

Since the Tiananmen protests in 1989, China has allowed citizens more economic freedoms, which have benefited a lot of American brands, but there are still sectors they are heavily restricted in.

Many U.S. tech firms are blocked, but there are homegrown equivalents inside the "Great Firewall."