THE Shanghai B market rebounded yesterday, with the Credit Lyonnais index adding 17.9 points, 2.81 per cent, on active trading as investors rushed in to take advantage of some bargains. The Credit Lyonnais Shanghai B index closed at 655.2. By contrast, the Shenzhen B market lost ground, continuing its decline. The Credit Lyonnais Shenzhen B index closed down 11.4 points at 796.5. Shekou Port was the most active counter, edging up more than 1.8 per cent. Shares for mainland investors took opposite directions in the two cities. In Shanghai, the Credit Lyonnais index added 30.5 points to close at 5,280.5, whereas in Shenzhen, the Credit Lyonnais index shed 29.6 points to end at 1,905.2. The combined results took both the Credit Lyonnais All Share and the Credit Lyonnais China B indices down. The All Share slipped 1.07 per cent to 2,027.6, while the composite B index lost nearly as much - 0.94 per cent - to end at 827.1.