Chinese tourists = Chinese spies?

"In July 2013, Senator Hirono led a bipartisan letter to urge Secretary of State John Kerry and Secretary of the Treasury Jacob Lew to push for extending travel visas for Chinese tourists during the U.S.-China Strategic and Economic Dialogue."

hirono.senate.gov//news/press-releases/senator-hirono-applauds-announcement-of-10-year-visas-between-the-us-and-china