Solving the Case is Slightly Bitter, My Sister is Super Sweet.

Summary

Lin Xuan investigates foreign nationals in C City, discovering a suspicious foreign-invested enterprise with two office buildings. During a thorough search, he detects danger on the 5th floor and finds a hidden, soundproofed ceiling space. Inside, he encounters two highly skilled operatives - a white male and a Black female - who attempt to shoot him. Using exceptional speed and strength, Lin Xuan quickly neutralizes both opponents, demonstrating remarkable combat skills and revealing a potentially significant covert operation involving international agents.

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