Chen Lin solving the code

Chen Lin studied the numbers, her mind racing. "We need to think about where we found them."

They had collected the numbers from different locations across the shopping district.

The number 3 was printed on a large billboard advertising a sale that started in March, the third month of the year.

8 was part of a banner celebrating the store's eighth anniversary.

15 appeared on a digital countdown screen for a fifteen-minute flash sale.

21 was in a plaque stating that the mall was built in 2021.

And then there was 12, which had been found on a promotional poster featuring a special twelve-hour discount event.

Chen Lin's eyes sharpened. "Follow the rhythm of time."

She turned to Sun Wei. "Think about it. All these numbers are connected to time—months, years, countdowns, and durations. But one of them doesn't fit."

Sun Wei's brows furrowed. "The twelve-hour discount event…?"