Simply sign up to the Life & Arts myFT Digest -- delivered directly to your inbox. For many toys, a tumble down the stairs is game over: for the Slinky it is the very purpose of its existence. The ...

Wu Wuqiang has become a well-known figure at home and abroad because of a small toy — the rainbow spring. Wu, from Maoming, a coastal city in the western part of Guangdong province, set a mark ...