diff --git a/assets/section_3.1_1686980736370_0.edn b/assets/section_3.1_1686980736370_0.edn
index 80a7680..ea3a197 100644
--- a/assets/section_3.1_1686980736370_0.edn
+++ b/assets/section_3.1_1686980736370_0.edn
@@ -9,5 +9,17 @@
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                           :page 5},
                :content {:text "[:span]", :image 1686981151907},
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+               :page 7,
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+                          :rects (),
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                :properties {:color "yellow"}}],
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diff --git a/pages/hls__section_3.1_1686980736370_0.md b/pages/hls__section_3.1_1686980736370_0.md
index da062d6..7fcdaa2 100644
--- a/pages/hls__section_3.1_1686980736370_0.md
+++ b/pages/hls__section_3.1_1686980736370_0.md
@@ -7,4 +7,11 @@ file-path:: ../assets/section_3.1_1686980736370_0.pdf
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   hl-type:: area
-  hl-stamp:: 1686981151907
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+  hl-stamp:: 1686981151907
+- [:span]
+  ls-type:: annotation
+  hl-page:: 7
+  hl-color:: yellow
+  id:: 648d4b39-6c56-4dd6-af90-c3e1e81e90ff
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+  hl-stamp:: 1686981432045
\ No newline at end of file
diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index a6d1671..2dc05fc 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2868,6 +2868,7 @@
 						- Random Vectors and joint distributions
 							- Definition:
 								- ((648d4a20-af7c-42d5-addc-b2909e3d9fa0))
+							- Properties
 								-
 			- LATER 学积分
 			  :LOGBOOK: