Tang 迦 held the watch chain on the tip of his folding fan and squinted under the shadowless light in the evidence room: "What kind of foreign thing is this? It's a variation of the Ming Dynasty Lu Ban lock!" He suddenly poked the edge of the dial with the fan bone, and the brass shell popped open with a "click", revealing the relief of the sixty-four hexagrams on the inside.

Su Chen used a 3D scanner to build a model, and the corresponding digit code of the hexagram jumped on the screen: "This is the Virginia code used by the Allies in 1946." He suddenly called up Poirot's case records, "Look here - Poirot used the same encryption method when he cracked the Rangoon vault case."

Qin Feng put the pocket watch into liquid nitrogen, and the dial glass showed the fingerprint pattern at -196℃. He stuttered and retrieved the database: "Right...right middle finger thread and the autopsy report of my jewelry tycoon grandfather..." Suddenly stopped, and under the magnifying glass, it was seen that there were fine pinholes on the edge of the fingerprints - the traces of horse milk injection that year.

"No wonder you made a golden Buddha to calm the soul!" Tang 꿦 tore off his Tang suit to reveal the tattoo on his back, "When the Zheng fleet encountered ghosts, they used gilding..." He suddenly got stuck, and the Malacca Strait tattoo on his body oozed fine blood beads. Su Chen used a cotton swab to take a sample, and the DNA test showed that he was related to the first mate of the "Hai'an".

On a rainy night, three people dived into the abandoned shipyard. Tang Feng's compass was attached to the rusty submarine door: "Gold is found in the Qian Palace, there is something inside!" Qin Feng used a flashlight to see the scratches on the wall - the traces of the last struggle of the "Haian" crew reported in the newspaper in 1946.

Su Chen used a laser cutter to break open the safe, and the logbook in the moisture-proof box suddenly caught fire. Tang Xiao picked up the fire extinguisher and sprayed it wildly, and the foam condensed into a code on the surface of the logbook: "Poirot's lemon juice steganography!" The navigation map displayed under the purple light pointed directly to the Mekong River warehouse of the contemporary smuggling group.

The smuggling boat cut through the morning mist of the Mekong River, and Tang 꿦's gold silk Tang suit was soaked with moisture and sank straight down. "Let you wear a bulletproof vest!" Su Chen dragged him into the ventilation duct, and the nano gloves scraped blue paint chips on the wall of the duct - exactly the same as the scratch marks on the cold storage liquid nitrogen truck.

Qin Feng suddenly stuttered on the communication channel: "Three...three o'clock!" The thermal image showed that there was an object reaction in the compartment of the cargo box. Tang 꿦 threw out the Five Emperors' Coins to smash the fire sprinkler, and the water flow triggered the electronic lock to short-circuit, and thirty gilded Buddhas appeared in the bulletproof glass cabinet.

"This is what it means to return the jade intact to Zhao!" Tang 꿦 posed as Huang Feihong, but stepped on the secret compartment. The entire shelf flipped over, revealing Poirot's portable typewriter. Qin Feng removed the ribbon stuck between the rollers, and the microscope reader identified the letter sent by 냭: "...The gold plating process is actually a cover-up for smuggling gold..."

The jewelry tycoon's yacht suddenly caught fire, and Su Chen threw out the electromagnetic jammer. The out-of-control rudder crashed the hull into the reef, and Tang Yu used the Luoyang shovel to hook the rescue raft: "This move of my master is called 'catching the moon from the bottom of the sea'!" A waterproof box floated up in the waves, and inside it was a 1946 gold-plated Buddha mold and a contemporary smuggling account book.

In the interrogation room of the police station, Su Chen placed the pocket watch in front of the jewelry tycoon: "Poirot discovered your grandfather's gold-plating and money-laundering technique in 1946." He pressed the crown, and a microfilm popped out from the secret compartment on the side, on which was a photo of Poirot and the young jeweler.

Tang 꿦 kicked the door open and threw out the consumption record of the tattoo shop: "The nautical map on your back was tattooed last year!" Qin Feng played the surveillance video step by step - the tycoon sneaked into the museum on the eve of the incident and modified the temperature control system with the refrigerant of the liquid nitrogen truck.

When the rain stopped, the three of them stood in front of the gilded Buddha, which had been restored to its original place. Tang's compass suddenly attached to the lotus base, and Qin Feng detected a weak electromagnetic field - inside the Buddha statue was a handwritten letter from Poirot: "To the detective who came: Gold will oxidize, but the truth will always shine."