Police said they have launched a massive manhunt to catch a Chinese national believed to be the mastermind behind the smuggling of 88 kg gold, which was seized by the law enforcement agency from Chhetrapati .A source at Metropolitan Police Crime Division informed that Wan Wei Ming, 50, who was allegedly operating the smuggling racket under the cover of tourism entrepreneur and restaurateur in Thamel, and his wife Yang Wei Wing, managed to flee when police arrested car driver Manoj Adhikari with the vehicle carrying gold worth around Rs 430 million. .