The Bund Post Office Building and Shiliupu Black Market
The "Declaration" stamped with a Hong Kong postmark contains secretly written information. Gu Huaizhou was ordered to track down the Jiang defense map passed by Japanese spies through philatelic transactions. In the sorting room, he found the parameters of warships arranged with perforations on stamps, but his plan was disrupted by a Song Dynasty official kiln porcelain vase smuggled by a gangster. In the end, he made a mistake and stuffed the fake waterway map into the belly of the bronze prince at the auction, causing the Japanese gunboat to hit the rocks at Wusongkou.
