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He said Bulgaria is willing to work together with China to promote mutually beneficial cooperation in all fields and achieve new progress of the all-round friendly partnership between the two countries.

Veolia Water began using activated carbon at 3 a.m. on Friday to absorb the organic matter and dilute the pollution.

Enterprises shall deem honesty as a business foundation, and related lawmaking will be speeded up to support social credit progress, according to the guidelines.

"China will continue to urge the EU to ease its restrictions on and facilitate high-tech product and technology export to China, so as to release the great potential of bilateral high-tech trade," it said.

The country should improve the legal system, identify the power of governments at different levels, stabilize the tax burden and push for budget transparency, he said.