Transfer: Forward Industry Institute Major industrially listed companies: long-term fibre-optic (601869); Interfire communication (600498); medium-day science and technology (600522) etc. Core data for this paper: export volume; import volume; export monopoly; import unitChina’s trade surplus in the bar industry has gradually expanded.According to China’s bar industry (tax code: 70022010) imports and exports are known to show a general downward trend in total imports from the Chinese bar indu...