diff --git a/src/qelmt/dynamictext.rs b/src/qelmt/dynamictext.rs
index 8b15f22..af0b127 100644
--- a/src/qelmt/dynamictext.rs
+++ b/src/qelmt/dynamictext.rs
@@ -173,6 +173,7 @@ impl ScaleEntity for DynamicText {
         self.align_x *= fact_x;
         self.align_y *= fact_y;
         self.font.scale(fact_y);
+        self.text_height = self.text_height * fact_y;
     }
 
     fn left_bound(&self) -> f64 {
@@ -365,7 +366,8 @@ impl<'a> DTextBuilder<'a> {
         dbg!(&self.text);*/
         let value = super::strip_mtext_control_sequences(&value);
         // 将 DXF 中读取到的 text_height 放大 2 倍（用户要求）
-        let text_height = text_height * 2.0;
+        // let text_height = text_height * 2.0;
+        let text_height = text_height;
         let text_width = if reference_rectangle_width > 0.0 {
             reference_rectangle_width
         } else {
diff --git a/src/qelmt/mod.rs b/src/qelmt/mod.rs
index a2da2ea..eb92216 100644
--- a/src/qelmt/mod.rs
+++ b/src/qelmt/mod.rs
@@ -295,7 +295,7 @@ impl Definition {
             Units::Inches => 50.8,
             Units::Feet => 609.6,
             Units::Miles | Units::USSurveyMile => 3_218_694.437_4,
-            Units::Millimeters => 2.0,
+            Units::Millimeters => 3.78,
             Units::Centimeters => 20.0,
             Units::Meters => 2_000.0,
             Units::Kilometers => 2_000_000.0,