Cao Wenxuan understood the difficulties, but he persisted. In addition to himself, many experts from the Institute of Aquatic Sciences of the Chinese Academy of Sciences have actively called for a ten-year ban on fishing in the Yangtze River. Academician Zhao Jindong, former director of the Institute of Aquatic Sciences of the Chinese Academy of Sciences, also submitted related proposals several times during his ten years as a member of the CPPCC National Committee.arweave fee calculator