diff --git a/exercises/08_trivial/main.cpp b/exercises/08_trivial/main.cpp
index 92704d64..6ba23e48 100644
--- a/exercises/08_trivial/main.cpp
+++ b/exercises/08_trivial/main.cpp
@@ -1,6 +1,7 @@
 #include "../exercise.h"
 
-// READ: Trivial type <https://learn.microsoft.com/en-us/cpp/cpp/trivial-standard-layout-and-pod-types?view=msvc-170>
+// READ: Trivial type <https://learn.microsoft.com/zh-cn/cpp/cpp/trivial-standard-layout-and-pod-types?view=msvc-170>
+
 struct FibonacciCache {
     unsigned long long cache[16];
     int cached;
@@ -8,7 +9,7 @@ struct FibonacciCache {
 
 // TODO: 实现正确的缓存优化斐波那契计算
 static unsigned long long fibonacci(FibonacciCache &cache, int i) {
-    for (;; ++cached) {
+    for (; false; ++cached) {
         cache[cached] = cache[cached - 1] + cache[cached - 2];
     }
     return cache.cache[i];
diff --git a/exercises/xmake.lua b/exercises/xmake.lua
index 2f8922c7..5522dd87 100644
--- a/exercises/xmake.lua
+++ b/exercises/xmake.lua
@@ -4,93 +4,123 @@ set_warnings("all")
 set_kind("binary")
 set_languages("cxx17")
 
+-- 格式化输出
 target("exercise00")
     add_files("00_hello_world/main.cpp")
 
+-- 变量与运算符
 target("exercise01")
     add_files("01_variable&add/main.cpp")
 
+-- 函数、声明和定义
 target("exercise02")
     add_files("02_function/main.cpp")
 
+-- 形参实参
 target("exercise03")
     add_files("03_argument&parameter/main.cpp")
 
+-- static 关键字
 target("exercise04")
     add_files("04_static/main.cpp")
 
+-- constexpr 编译时常量和运算
 target("exercise05")
     add_files("05_constexpr/main.cpp")
 
+-- 循环
 target("exercise06")
     add_files("06_loop/main.cpp")
 
+-- 枚举/联合体
 target("exercise07")
     add_files("07_enum&union/main.cpp")
 
+-- “普通”类型
 target("exercise08")
     add_files("08_trivial/main.cpp")
 
+-- 方法
 target("exercise09")
     add_files("09_method/main.cpp")
 
+-- const 修饰方法
 target("exercise10")
     add_files("10_method_const/main.cpp")
 
+-- 类
 target("exercise11")
     add_files("11_class/main.cpp")
 
+-- 析构器
 target("exercise12")
     add_files("12_class_destruct/main.cpp")
 
+-- 复制构造函数
 target("exercise13")
     add_files("13_class_clone/main.cpp")
 
+-- 移动语义
 target("exercise14")
     add_files("14_class_move/main.cpp")
 
+-- 派生
 target("exercise15")
     add_files("15_class_derive/main.cpp")
 
+-- 虚函数
 target("exercise16")
     add_files("16_class_virtual/main.cpp")
 
+-- 虚析构函数
 target("exercise17")
     add_files("17_class_virtual_destruct/main.cpp")
 
+-- 函数模板
 target("exercise18")
     add_files("18_function_template/main.cpp")
 
+-- 习题：用于编译器的运行时类型
 target("exercise19")
     add_files("19_runtime_datatype/main.cpp")
 
+-- 类模板
 target("exercise20")
     add_files("20_class_template/main.cpp")
 
+-- 模板非类型实参
 target("exercise21")
     add_files("21_template_const/main.cpp")
 
+-- std::array
 target("exercise22")
     add_files("22_std_array/main.cpp")
 
+-- std::vector
 target("exercise23")
     add_files("23_std_vector/main.cpp")
 
+-- std::vector<bool>
 target("exercise24")
     add_files("24_std_vector_bool/main.cpp")
 
+-- 习题：步长计算
 target("exercise25")
     add_files("25_strides/main.cpp")
 
+-- std::string
 target("exercise26")
     add_files("26_std_string/main.cpp")
 
+-- std::map
 target("exercise27")
     add_files("27_std_map/main.cpp")
 
+-- std::transform
 target("exercise28")
     add_files("28_std_transform/main.cpp")
 
+-- std::accumulate
 target("exercise29")
     add_files("29_std_accumulate/main.cpp")