BOTH Chinese exchanges ended on a flat note on Friday after being marked by volatility in the previous weeks. Last Monday, prices were driven down sharply on both exchanges after there was a crackdown on unauthorised trading in Shenzhen. However, the following day, true to its volatile nature, the Shanghai market rebounded, with the A shares putting on four per cent. In Shenzhen on Wednesday, a quiet market became even more sombre after national market watchdog boss Liu Hongru, who was in the city, failed to visit the exchange. At the end of the week, the Credit Lyonnais Shanghai A index was up marginally to 2,954.53 on thin volume of 10.3 million shares. Shenzhen B shares dropped less than one per cent, ending the week at 1,377.25 on quiet turnover of less than 710,000 yuan. In Shanghai, the Credit Lyonnais A and B indexes each lost less than one per cent in quiet trade. Shanghai A shares finished the week at 7,814.5, while B shares closed at 1,019.28. Friday marked the final session for B share quotations in yuan in Shenzhen. Beginning today, US dollar values will be used.