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"Each time they brought this up to us, the story changed, and each time we investigated we found nothing," he added.

"During the due diligence, we could tell that US is quite friendly to foreign direct investment as a mature economy. It's easy to communicate with local county, city, EDC (economic development corporation) and school districts. We are very happy with the local supporting staff, the transparency and efficiency, which make things a lot easier," Jiang said.

"Despite the attraction of the China market and its considerable private sector, China's economic model is amplified through highly strategic initiatives including the Belt and Road," said Charlene Barshefsky, former US trade representative.

"Facing the new situation, photovoltaic companies should actively adapt to the trend and enact reforms, to grasp opportunities and meet the challenges," Niu said.

"Every year, we conduct three to four workshops for the farmers to help them improve their skills and business thinking."