diff --git a/crates/fidc-core/src/cost.rs b/crates/fidc-core/src/cost.rs
index 61ad310..e95e135 100644
--- a/crates/fidc-core/src/cost.rs
+++ b/crates/fidc-core/src/cost.rs
@@ -89,6 +89,10 @@ impl ChinaAShareCostModel {
         self.fixed.minimum_commission = Self::fixed_money(value, "minimum commission");
     }
 
+    pub fn set_transfer_fee_rate(&mut self, value: f64) {
+        self.fixed.transfer_fee_rate = Self::fixed_money(value, "transfer fee rate");
+    }
+
     pub fn set_stamp_tax_rate_before_change(&mut self, value: f64) {
         self.fixed.stamp_tax_rate_before_change =
             Self::fixed_money(value, "stamp tax rate before change");
@@ -103,6 +107,30 @@ impl ChinaAShareCostModel {
         self.fixed.stamp_tax_change_date = value;
     }
 
+    pub fn commission_rate(&self) -> f64 {
+        self.fixed.commission_rate.to_f64()
+    }
+
+    pub fn minimum_commission(&self) -> f64 {
+        self.fixed.minimum_commission.to_f64()
+    }
+
+    pub fn transfer_fee_rate(&self) -> f64 {
+        self.fixed.transfer_fee_rate.to_f64()
+    }
+
+    pub fn stamp_tax_rate_before_change(&self) -> f64 {
+        self.fixed.stamp_tax_rate_before_change.to_f64()
+    }
+
+    pub fn stamp_tax_rate_after_change(&self) -> f64 {
+        self.fixed.stamp_tax_rate_after_change.to_f64()
+    }
+
+    pub fn stamp_tax_change_date(&self) -> NaiveDate {
+        self.fixed.stamp_tax_change_date
+    }
+
     pub fn with_commission_rate(mut self, value: f64) -> Self {
         self.set_commission_rate(value);
         self