Volume 1: Zhuangtian Jinghong

**When Sanbao solved the last problem of the Nine Chapters on the Mathematical Art using a diaper as scratch paper, the Imperial College's chief academic officer's white beard exploded into dandelions.**

"Master Gu! This is a sage's classic, not a parenting diary!" The great scholar Lu Jiuzhang trembled as he held up the Mathematical Sutra covered in Peppa Pig illustrations. "You let a three-year-old illustrate the 'Sea Island Mathematical Sutra'?!"

Gu Jinghong picked up Sibao, who was sprinkling rainbow candies into the inkstone, and said, "Mr. Lu, this is our newest invention—" She suddenly thrust Sanbao's abacus into the old priest's arms, "a holographic immersive mathematics enlightenment method."

Sanbao snapped the abacus beam, sending the flying beads forming a Klein bottle model in mid-air. Sibao, drooling, lunged over, "Daddy's bathtub!" Inside the bottle, a projection of the protagonist locked in a quantum lab shone, the screen scrolling "Emotional Variable Clearing Progress 27%."

Section 1: Diaper Calculus

Morning light streamed through the windows of the academy, where the quadruplets were playing "Arithmetic Challenge." Erbao's sharp eyes flickered across the Zhoubi Suanjing, and suddenly solid geometric models popped out from the pages.

"Strategy of War, Stratagem 900—" Gu Jinghong used his Mo Dao to pick up the mutated abacus, "replace a supercomputer with a naughty child."

Sanbao's abacus beads suddenly formed the Riemann hypothesis: "Mom! Daddy hid a message in the numbers!" Upon hearing this, Sibao pushed the dragon horn into the inkstone, and the ink flew into the air and condensed into the figure of the male protagonist - he was using his wedding ring to carve a formula on the glass, and the inner ring of the ring was flashing [Key = Sibao's birthday × 27].

The bronze sword spirit flew over with a candied haws in its mouth: "Young master, Mr. Lu is here to challenge us with the "Ji Gu Suan Jing"..." Before he finished speaking, the gate of the courtyard collapsed with a "boom", and twenty-eight mechanical servants carrying calculating tools filed in, with the blue light of [Cleaner No. 27·Culture and Education Specialized Type] appearing in their pupils.

Section 2: Cute Baby vs. the Calculation Saint

Lu Jiuzhang waved his sleeves and posed the age-old question: "There are chickens and rabbits in the same cage. There are thirty-five heads on top and ninety-four legs below..."

"Stop!" Sanbao flung out his rainbow beads. "This kind of problem can be solved with your toes!"

Sibao immediately took off his tiger-head shoes, dipped his toes in ink, and wrote an equation on his diaper:

- Draw chicken feet into Hello Kitty

- Rabbit's Foot turns into Popping Candy Bomb

- The cage was transformed into a space capsule by the dragon horn

- If you get the number "23 Chicken 12 Rabbit", you will automatically start square dancing.

"This, this, this... How shameful!" Lu Jiuzhang's white beard twisted into a knot. Erbao took the opportunity to burp a blueberry-flavored poisonous milk, and the poison mist condensed into a four-dimensional spatial model in the air. The male protagonist was in the laboratory and collapsed, shouting: "Children are the key to mathematics!"

Section 3: Abacus Breaks the Sky

In the final showdown, Lu Jiuzhang used his ultimate "Huantian Deduction Diagram." Sanbao's abacus beads suddenly quantized, reconstructing a Klein bottle in mid-air:

- Dabao carves non-Euclidean geometry tracks with a Mo Dao

- Erbao's poisonous tears corrode the topological structure

- Sibao drives the Dragon Horn spaceship to travel through dimensions

- The mechanical servant suddenly starts to dance the "Chicken Dance"

"I see!" Lu Jiuzhang ripped open his Confucian robe, revealing the barcode on his chest: "System Special Correspondent No. 27." Sanbao swung out his last three abacus beads, shattering the floating wedding ring projection. The chip embedded in the ring suddenly played a recording: "Hong'er, the 27 trillionth digit of pi is the children's birthday..."

###

1. **Confucian robe code**: Lu Jiuzhang has a star map with embryo numbers sewn into his sleeves

2. **Ink Afterimage**: Four Treasures' Footprints Hidden Laboratory Coordinates

3. **Mechanical Easter Egg**: The pupils of the servant play the cryostat surveillance video

4. **Starry Sky Puzzle**: A bloody countdown of "2023.02.27" emerges from the depths of a Klein bottle