SHANGHAI (Reuters) - Shares in Chinese toy makers, diaper producers and infant food companies soared for the second day on Tuesday, as investors piled into stocks seen as benefitting from Beijing s new three-child policy. China s announcement on Monday to allow married couples to have up to three children - from the previous limit of two - also sent brokerage analysts scrambling to recommend stocks, despite a widely-shared perception that the policy shift won t have a sudden impact on the country s declining birth rate. Shares in toy maker Goldlok Holdings (Guangdong) Co jumped to their 10% daily limit for the second day, as did shares in Jinfa Labi Maternity & Baby Articles Co. Other baby-related stocks, including milk powder maker Beingmate Co, baby products maker Shanghai Aiyingshi Co and toddler care equipment maker Ningbo David Medical Device Co also soared. An index tracking the so-called third baby concept stocks, newly compiled by Hithink RoyalFlush Information Network Co, rose