The lame old man's mechanical prosthesis rolled over the teak deck, making a slight sound of gears engaging. Tang 꿦's compass suddenly attached to the metal joint of the prosthesis, and the pointer trembled violently at the "HP" mark. "This is the needle dot matrix in the "Geng Lu Bu"!" He pulled open his collar, revealing the Zheng He nautical tattoo on his back, "Old man, the sextet on your leg is pointing to the reefs in the Gulf of Siam!"

Su Chen used a laser pen to scan the pattern of the prosthetic limb, and the holographic projection in the air pieced out a sea map of 1946. Qin Feng suddenly snatched the pocket watch from the old man, and the reflection of the lens covered his eyes in shock: "Watch... the inside of the watch cover..." He stammered and pressed the pocket watch on the flat scanner, revealing a micro-carved Buddha head design under the silver coating.

"Seventy-six years ago, the 'Hai'an' saw the shadow of a treasure ship on a stormy night." The old man's voice was hoarse like rusty anchors grinding against each other, "We salvaged this gilded Buddha, but they died one after another on the way back..." He lifted his sleeves, and strange blue-black blood vessel patterns spread across the crook of his arm.

Tang 꿦 suddenly took out a bag of cinnabar powder and sprinkled it on the old man: "The corpse's poison attacks the heart! This is said in the Maoshan Chronicle..." Before he finished speaking, Su Chen grabbed his wrist. The microscope helmet showed that the old man's blood vessel patterns were actually deposits of nanometal particles.

"You plated the Buddha statue with a new alloy." Su Chen wiped the Buddha head model with test paper, and the chemical reaction turned indigo. "This cobalt-chromium compound will produce neurotoxins when it comes into contact with salt mist - the crew was poisoned by heavy metals back then!"

Heavy rain hit the porthole, and Qin Feng put his pocket watch into the ultrasonic cleaner. The black powder that came out of the gap in the watch chain revealed an equiaxed crystal structure under the electron microscope - the composition of the gold layer of the missing golden Buddha. He suddenly stuttered and shouted: "Three...three o'clock!" The tablet pulled up the ship's registration form, and the name of the first mate of the "Haian" was the same as the grandfather of the cold storage manager.

The old man suddenly ripped open his shirt, revealing a star map tattooed on his chest: "We separated back then, leaving me alone to keep this secret." He pointed his trembling fingertips at the three stars of the Sky Ship, "Every ten years we have to find a scapegoat to reset the curse..."

"Electrolytic reaction." Su Chen used a multimeter to test the Buddha head model. "You use a wet battery on the boat to power the Buddha statue. The seawater will be electrolyzed to produce chlorine mixed with gilded steam..." He suddenly grabbed the old man's robotic hand. The wear marks on the fingertips of the prosthetic limb matched the cold storage door lock perfectly.

Tang Jinzheng poked the safe with a peach wood sword wrapped in gold foil: "Heavenly thunder and earthly fire, open it for this master!" The tip of the sword accidentally triggered the air pressure lock, and a sheepskin scroll spurted out of the box and rolled onto the deck. Qin Feng suddenly stuttered and lost his words when he picked it up - it was a 1946 stock rights agreement, and the beneficiary column was stamped with the seal of the grandfather of a contemporary jewelry tycoon.

The whistle tore through the rain curtain, and three speedboats surrounded them. Su Chen stuffed the sheepskin roll into the waterproof bag, and Tang Xiao lifted the lifebuoy and smashed the porthole: "The wind is coming from Xun Palace, jump!" The moment the three fell into the Chao Phraya River, the speedboat searchlight illuminated the old man's last smile - the star map on his chest overlapped with the navigation software on Su Chen's mobile phone screen saver.

In the muddy river, Qin Feng pinched his stuffy nose and handed over a miniature oxygen tank. His gold-threaded Tang suit became a burden, and he doggy-paddled while cursing, "Who the hell sewed lead into my clothes..." Suddenly, he was caught in a fishing net at the bottom of the river, and the gilded Buddha's hand in the net glowed blue under the flashlight.

"Found... Found it!" Qin Feng's face flushed red. The tablet projected an AR model underwater - the fractured surface of the Buddha's hand perfectly matched the remaining ice crystal cracks in the exhibition hall. Su Chen suddenly dragged the two of them into the water, and the propeller of the speedboat above them stirred up a deadly vortex. They swam in the direction pointed by the Buddha's hand, and the rattan pots at the entrance of the cave at the bottom of the river were arranged into the Big Dipper.