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"But some bad and pornographic information that is trying to harm the industry can still be found among online literature," the statement said. "Meanwhile, a few internet enterprises that lack reviews or even take the initiative to spread harmful content also damage the industry's environment and readers' interests."

"China is playing an increasingly important role due to the sale of hearing solutions via private specialist stores and retail chains, he said, adding the country shows a vast potential in market penetration as an estimated 70 million people in the country suffer from hearing loss, but a mere 5 percent own hearing aids.

"China firmly opposes that," he said in a statement posted on the ministry website.

"China and US trade cooperation is essential for bilateral relations and hence mutually beneficial. We hope the two countries will continue on a path of cooperation considering China and the US are now each other's major trading partner," he said.

"China has no previous research on the sun bear. The 10-second video is surely exciting," he said.