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on september 23, the joint meeting and expansion meeting of presidents of guangdong machinery industry association and guangdong electrical industry association was held in shantou guesthouse. more than 30 vice presidents of the association and their representatives attended the meeting.  the meeting was chaired by mr. wu hanrong, vice president of provincial machinery industry association and chairman of guangdong zhengchao electric co., ltd. after the meeting, the delegates visited the digital workshop of guangdong zhengchao electric co., ltd.