diff --git a/High‐assurance-field-inversion-for-curve‐based-cryptography.md b/High‐assurance-field-inversion-for-curve‐based-cryptography.md
index bcc70f6..8136931 100644
--- a/High‐assurance-field-inversion-for-curve‐based-cryptography.md
+++ b/High‐assurance-field-inversion-for-curve‐based-cryptography.md
@@ -225,7 +225,10 @@ PASS
 ok  	github.com/emmansun/gmsm/internal/sm2ec/fiat	1.793s
 ```
 
-2. 用devsteps2事先的模求逆并没有比经过addchain优化的模求逆方法性能好。
+2. 用divsteps2事先的模求逆并没有比经过addchain优化的模求逆方法性能好。
+
+# 尝试优化实现：jumpdivstep2等
+// TODO
 
 # Reference
 - [High-assurance field inversion for curve-based cryptography](https://eprint.iacr.org/2021/549.pdf)