diff --git a/plonk-intro-cn/plonk-permutation.md b/plonk-intro-cn/plonk-permutation.md
index df934b4..f8fd003 100644
--- a/plonk-intro-cn/plonk-permutation.md
+++ b/plonk-intro-cn/plonk-permutation.md
@@ -116,8 +116,8 @@ $$
 q_i & r_i & q_i\cdot r_i \\
 \hline
 q_0 & 1  & r_0\\
-q_1 & r_0 & r_1\\
-q_2 & r_1 & r_2\\
+q_1 & r_1 & r_2\\
+q_2 & r_2 & r_3\\
 \vdots & \vdots & \vdots\\
 q_{n-2} & r_{n-2} & r_{n-1}\\
 q_{n-1}=\frac{1}{p} & r_{n-1} & 1 \\
@@ -303,4 +303,4 @@ $$
 
 - [WIP] Copy constraint for arbitrary number of wires. https://hackmd.io/CfFCbA0TTJ6X08vHg0-9_g
 - Alin Tomescu. Feist-Khovratovich technique for computing KZG proofs fast. https://alinush.github.io/2021/06/17/Feist-Khovratovich-technique-for-computing-KZG-proofs-fast.html#fn:FK20
-- Ariel Gabizon. Multiset checks in PLONK and Plookup. https://hackmd.io/@arielg/ByFgSDA7D
\ No newline at end of file
+- Ariel Gabizon. Multiset checks in PLONK and Plookup. https://hackmd.io/@arielg/ByFgSDA7D