China's third largest pop toy seller, a spinoff of Japanese-style retailer Miniso, has filed for a Hong Kong IPO just five years after its foundingKey Takeaways:Miniso spinoff Top Toy has filed to list in Hong Kong, aiming to leverage its parent's network of 7,000 global stores as it seeks to copy Pop Mart's successA $1.3 billion valuation and growing stable of self-developed intellectual property could boost the toymaker's chances of success in an increasingly crowded fieldWhen entrepreneur Ye Guofu founde ...