diff --git a/PRINCIPLE.md b/PRINCIPLE.md
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index 0000000..e69de29
diff --git a/SUMMARY.md b/SUMMARY.md
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--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -1,5 +1,21 @@
 # Summary
 
+* [Golang](/golang/README.md)
+  * []()
+* [Principle](/PRINCIPLE.md)
+  * [SRP-Single Responsibility Principle](/principle/srp.md)
+  * [OCP-Open Close Principle](/principle/ocp.md)
+  * [LSP-Liskov Substitution Principle](/principle/lsp.md)
+  * [ISP-Interface Segregation Principle](/principle/isp.md)
+  * [DIP-Dependence Inversion Principle](/principle/dip.md)
+  * [DRY-Don't Repeat Yourself](/principle/dry.md)
+  * [KIS-Keep it Simple Stupid](/principle/kis.md)
+  * [You "Ain't Gonna Need It](/principle/xxx.md)
+  * [Law Of Demeter](/principle/lod.md)
+  * [Composite/Aggregate Reuse Principle CARP](/principle/crp.md)
+  * [Refrence](/PRINCIPLE.md)
+    * [software-principles](https://code.tutsplus.com/tutorials/3-key-software-principles-you-must-understand--net-25161)
+    * [golang-example](https://golangbyexample.com/)
 * [Go Patterns](/README.md)
   * [Creational Patterns](/README.md#creational-patterns)
     * [Abstract Factory](/creational/abstract_factory.md)
diff --git a/golang/README.md b/golang/README.md
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--- /dev/null
+++ b/golang/README.md
@@ -0,0 +1,20 @@
+* [Byte](/goang/byte.md)
+  * [Word](#word)
+  * [BitSet](#bitset)
+* [Basic Type](/golang/type-basic.md)
+  * [Integers](/golang/type-integers.md)
+  * [Floating-Point Numbers]()
+  * [Complex Numbers]()
+  * [Booleans]()
+  * [Strings]()
+  * [Constants]()
+* [Aggregate Type](/golang/type-aggregate.md)
+  * [arry](/golang/type-aggregate-arry.md)
+  * [struct](/golang/type-aggregate-struct.md)
+* [Reference Type](/golang/type-reference.md)
+  * [pointer](/golang/type-reference-pointer.md)
+  * [slice](/golang/type-reference-slice.md)
+  * [map](/golang/type-reference-map.md)
+  * [funcation](/golang/type-reference-funcation.md)
+  * [channel](/golang/type-reference-channel.md)
+* [Interface Type](/golang)
diff --git a/golang/go-num-type.go b/golang/go-num-type.go
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index 0000000..e69de29
diff --git a/golang/type-integers.md b/golang/type-integers.md
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@@ -0,0 +1,12 @@
+# integer
+
+整数用8bit、16bit、32bit、64bit表示，
+有符号整数分别对应int8、int16、int32、int64，用补码存储。
+无符号整数uint8、uint16、unint32、unint64，用原码存储。
+int、uint是使用最广泛的数值类型，是运算效率最高的数值。在编译时确定到底是多少位。
+
+rune是int32类型的别名，表示一个Unicode(code point).
+byte是uint8类型的别名，强调是原始的8位bit。
+
+uintptr(u-int-ptr):无符号整数，大小不确定，长用于保存指针。在unsafe package中。
+