The official California website promoting international trade and investment is found at http://www.businessportal.ca.gov. Their address is

1325 J St., Suite 1800
Sacramento, CA 95814

And their telephone: +1 877 345-4633

California ranks first in GDP among US states, placing it at the 1×1 pole position within the G8x8 territories. In 2016, California took a share of 14.1% of the USA total GDP. This was worth $2,602,672 million or 2.6 trillion US Dollars, just as much as the GDP of the United Kingdom (ranking 5th among countries).