MS SQL is limited to Windows platform and used by some small companies in North America. It is not as popular as Oracle and DB2 and ...If I were you, I would play some time on Oracle and change some of MS SQL experiences into Oracle experiences.
If you have a good communication and
language skill, you may play a DB architect role. However, few Chinese immigrants can get such a position.... I guess you are an MS SQL expert, but I suggest you don't confine yourself on MS SQL. We need to follow the job market.