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"By doing so, our friendship becomes even closer," he said.

"China is a vital part in HMH's global strategy," said Sam Bonfante, senior vice-president of HMH global markets. "VIPKID, linking 500,000 students and 60,000 teachers, is a Chinese innovation to combine education with technology."

"But now there are increasing numbers of retired people over age 60 due to the aging population, possibly bringing shortages in the labor force," he said.

"China Minmetals was one of the earliest participant in China-Chile economic cooperation," Guo said, noting that the company imported China's first shipment of electrolytic copper from Chile and inked a 15-year-long sales deal with a Chilean copper producer.

"China is a very important market for us both in terms of imports and exports, and for foreign direct investment. We also see a lot of opportunities because China is a very large market," said Timothy Kelley, president of the Imperial Valley Economic Development Corp, a partnership of private enterprises and local government that focuses on growing the regional economy.