diff --git a/memory_management/readme.txt b/memory_management/readme.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e9cc5dd93f7402aca55a42d6e76c4fd4b3f936d6
--- /dev/null
+++ b/memory_management/readme.txt
@@ -0,0 +1 @@
+内存管理
\ No newline at end of file
diff --git a/time_management/readme b/time_management/readme
new file mode 100644
index 0000000000000000000000000000000000000000..8790c289716d5efe6a0df7aecbeb88462544a239
--- /dev/null
+++ b/time_management/readme
@@ -0,0 +1 @@
+时钟管理
\ No newline at end of file
diff --git a/timer_management/readme b/timer_management/readme
new file mode 100644
index 0000000000000000000000000000000000000000..9367b2c1a31425b7cd34910bf8aae86255459fb8
--- /dev/null
+++ b/timer_management/readme
@@ -0,0 +1 @@
+定时器管理
\ No newline at end of file