diff --git a/homework/Go17028Yan/ch01_01.go b/homework/Go17028Yan/ch01_01.go
new file mode 100644
index 0000000000000000000000000000000000000000..e465265dc60537d134b77b1b3845430107f9a93c
--- /dev/null
+++ b/homework/Go17028Yan/ch01_01.go
@@ -0,0 +1,21 @@
+package main
+
+import "fmt"
+
+func main() {
+	var form string
+	for i := 1; i < 10; i++ {
+		for j := 1; j < i+1; j++ {
+			form = fmt.Sprintf("%dx%d=%d", i, j, i*j)
+			form = fmt.Sprintf("%-6s", form)
+			if j == 1 || (i == j && i*j < 10) {
+				form = form[:5]
+			}
+			fmt.Print(form)
+			if j < i {
+				fmt.Print(" ")
+			}
+		}
+		fmt.Println()
+	}
+}
diff --git a/homework/Go17028Yan/ch01_02.go b/homework/Go17028Yan/ch01_02.go
new file mode 100644
index 0000000000000000000000000000000000000000..4d44433b3cb536701dd3ca8bbdb2f0c5802f850b
--- /dev/null
+++ b/homework/Go17028Yan/ch01_02.go
@@ -0,0 +1,25 @@
+package main
+
+import (
+	"fmt"
+	"time"
+
+	"math/rand"
+)
+
+func main() {
+	rand.NewSource(time.Now().UnixNano())
+	oddS := 0
+	evenP := int64(1)
+
+	for i := range 20 {
+		num := rand.Intn(20) + 1
+		if i%2 == 0 {
+			evenP *= int64(num)
+		} else {
+			oddS += num
+		}
+	}
+
+	fmt.Printf("Sum: %d, Product: %d", oddS, evenP)
+}
diff --git a/homework/Go17028Yan/ch01_03.go b/homework/Go17028Yan/ch01_03.go
new file mode 100644
index 0000000000000000000000000000000000000000..651165a2f411a07ba9dfeb9e53f53613d4f01079
--- /dev/null
+++ b/homework/Go17028Yan/ch01_03.go
@@ -0,0 +1,12 @@
+package main
+
+import "fmt"
+
+func main() {
+	n1, n2 := 1, 1
+	for n1 <= 100 {
+		fmt.Printf("%d", n1)
+		n1, n2 = n2, n1+n2
+		fmt.Println()
+	}
+}