China Mobile, in which Vodafone has 2% stake from which it recently wrote off £300m, extended its 5% tumble of late yesterday with a further 1.5% fall, and rival China Unicom followed. Other telecom groups were also on the slide. Hutchison Whampoa, which has wide global cellular investments, fell 1.5%, and leading Hong Kong telecom provider Pacific Century Cyberworks lost more than half of Tuesday's sharp gain scored on a increase in a planned bond issue.