This author has not been identified. Look up 'Jun Cai' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Yu Wang' in GoogleThis author has not been identified. Look up 'Yan Liu' in GoogleThis author has not been identified. Look up 'Jian-Zhen Luo' in GoogleThis author has not been identified. Look up 'Wenguo Wei' in GoogleThis author has not been identified. Look up 'Xiaoping Xu' in Google