On May 14, Cheng Guangli, Secretary of Party Leadership Group and Chairman of the CPPCC of Sishui County, Jining City, led a team to Wanhao group for research. Wang Xiugang, Secretary of Party Leadership Group and Chairman of the CPPCC of Linqu County, Su Wanxun, Vice Chairman of the CPPCC and Director of the Cultural and Tourism Bureau of Linqu County. And other responsible personnel from relevant departments of Chengguan Street accompanied the research. Yin Peinong, Chairman of Wanhao Group, Wang Hongqi, General Manager, and Ma Xizhi, Deputy General Manager, participated in the event.

The research team came to the filter paper production site of Longde Company of Wanhao Group, listened to the report on the equipment level of the production line, product R&D, marketing, technological innovation, etc., and inspected the filter paper production line. The research team highly praised the orderly production site and tense and orderly working atmosphere of Longde Company, and highly praised the company's R&D capability and the industry status it has achieved.