Shanghai surge leads rally in Asian shares

Mainland Chinese shares closed up more than three percent, while Hong Kong, Tokyo and Seoul also rallied, although volumes were low after Wall Street and London were closed for public holidays. The greenback was boosted by remarks from Federal Reserve chair Janet Yellen that the US could raise interest rates "in the coming months" if data from the world's top economy continues to improve. Traders saw this as a vote of confidence in the US economy, which has remained resilient even after the Fed