{Economic Information Daily 20th exclusive} A-share market declines across the board in the afternoon, the SSE Composite Index falls 0.63%, closing at 3707.25 points, the CSI 300 Index drops 1.24%, the Shenzhen Component Index softens 0.85%, the ChiNext Index falls 1.07%. Shanghai B-shares decline 0.72%, Shenzhen B-shares drop 0.22%. Shipbuilding, non-ferrous metals and coal stocks lead the decline, while AI application concepts rise against the trend. (ry)