Labubu dolls on display at a Pop Mart International Group Ltd. store in Shanghai, China.Raul Ariano/BloombergWang Ning, the founder of Chinese toy maker Pop Mart International Group, has seen his net worth plummet by almost 6billioninlessthanamonth–asthelatesteditionofthecompany’sLabubuseriesofdollsseemstobelosingsometractioninmainlandChina.The38−year−oldchairmanandCEOnowhasanetworthof21.6 billion largely based on a company stake, according to Forbes estimates. The am ...