diff --git a/lectures/matplotlib.md b/lectures/matplotlib.md
index 377acfc..8ffd244 100644
--- a/lectures/matplotlib.md
+++ b/lectures/matplotlib.md
@@ -305,6 +305,7 @@ def draw_graphs(style='default'):
 
     # 设置样式表
     plt.style.use(style)
+    plt.rcParams['font.family'] = ['Source Han Serif SC', 'DejaVu Sans']  # i18n：样式表会重置 font.family，须在 style.use 之后重新应用
 
     fig, axes = plt.subplots(nrows=1, ncols=4, figsize=(10, 3))
     x = np.linspace(-13, 13, 150)
diff --git a/lectures/pandas_panel.md b/lectures/pandas_panel.md
index 171b2aa..d55db15 100644
--- a/lectures/pandas_panel.md
+++ b/lectures/pandas_panel.md
@@ -52,7 +52,7 @@ FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
 mpl.font_manager.fontManager.addfont(FONTPATH)  # i18n
 mpl.rcParams['font.family'] = ['Source Han Serif SC']  # i18n
 import seaborn as sns
-sns.set_theme()
+sns.set_theme(rc={'font.family': ['Source Han Serif SC', 'DejaVu Sans']})  # i18n：set_theme 会重置字体，用 rc 覆盖保留中文字体
 ```
 
 ## 概述