Chang points out that Cambridge University's Professor Joseph Needham once praised the seven-piece puzzles and nine magic rings as the epitome of China's brainteaser games. They look deceptively simple, but these brilliantly enjoyable puzzles will put your noggin through the wringer. The principles behind them are worth incorporating into the design of modern toys.
張世宗表示，曾被英國劍橋大學學者李約瑟讚為「中國益智游藝的代表作」的七巧板、九連環，包藏著看似簡單卻又變化萬千的智慧與游藝元素，值得開發、利用在現代玩具的設計上。