diff --git a/pkg/providers/check-issue/event.go b/pkg/providers/check-issue/event.go
index b6c1748..e0cef60 100644
--- a/pkg/providers/check-issue/event.go
+++ b/pkg/providers/check-issue/event.go
@@ -5,7 +5,7 @@ import (
 	"encoding/json"
 	"io/ioutil"
 	"net/http"
-	"strings"
+	"regexp"
 	"unicode"
 
 	"github.com/google/go-github/v32/github"
@@ -78,7 +78,9 @@ func (c *Check) IsIncludeChinese(str string) bool {
 	// filter <img>
 	str = filterImg(str)
 	// filter []
-	str = filterBracket(str)
+	str = filterSquareBracket(str)
+	// filter ``` ```
+	str = filterBackQuote(str)
 	var count int
 	for _, v := range str {
 		if unicode.Is(unicode.Han, v) {
@@ -90,26 +92,20 @@ func (c *Check) IsIncludeChinese(str string) bool {
 }
 
 func filterImg(str string) string {
-	for {
-		startIndex := strings.Index(str, "<img")
-		if startIndex == -1 {
-			break
-		}
-		endIndex := startIndex + strings.Index(str[startIndex:], ">")
-		str = str[0:startIndex] + str[endIndex+1:]
-	}
+	re := regexp.MustCompile(`<img.*?>`)
+	str = re.ReplaceAllString(str, "")
 	return str
 }
 
-func filterBracket(str string) string {
-	for {
-		startIndex := strings.Index(str, "[")
-		if startIndex == -1 {
-			break
-		}
-		endIndex := startIndex + strings.Index(str[startIndex:], "]")
-		str = str[0:startIndex] + str[endIndex+1:]
-	}
+func filterSquareBracket(str string) string {
+	re := regexp.MustCompile(`\[.*?\]`)
+	str = re.ReplaceAllString(str, "")
+	return str
+}
+
+func filterBackQuote(str string) string {
+	re := regexp.MustCompile("\\`\\`\\`.*?\\`\\`\\`")
+	str = re.ReplaceAllString(str, "")
 	return str
 }
 
diff --git a/pkg/providers/check-issue/event_test.go b/pkg/providers/check-issue/event_test.go
index 6606918..64b80d2 100644
--- a/pkg/providers/check-issue/event_test.go
+++ b/pkg/providers/check-issue/event_test.go
@@ -8,11 +8,25 @@ import (
 func TestFilterImg(t *testing.T) {
 	//str1 := "sfdf"
 	str := "352452aaaa 中文 <img >sss<><><><> <img width=\"956\" alt=\"屏幕快照 2021-02-03 下午8 13 16\" src=\"https://user-images.githubusercontent.com/5906259/106745942-c7cc2000-665c-11eb-9689-6bc8d77ce982.png\"> <><><>"
+	fmt.Println(str)
 	fmt.Println(filterImg(str))
 }
 
-func TestFilterBractet(t *testing.T) {
+func TestFilterSquareBracket(t *testing.T) {
 	//str := "[中文]2525[]"
 	str := "## Error Report\\r\\n\\r\\n**This repository is ONLY used to solve issues related to DOCS.\\r\\nFor other issues (related to TiDB, PD, etc), please move to [other repositories](https://github.com/pingcap/).**\\r\\n\\r\\nPlease answer the following questions before submitting your issue. Thanks!\\r\\n\\r\\n1. What is the URL/path of the document related to this issue?\\r\\n\\r\\nhttps://docs.pingcap.com/zh/tidb/dev/privilege-management\\r\\n\\r\\n2. How would you like to improve it?\\r\\n\\r\\ndelete grand in the table\\r\\n\\r\\n![企业微信截图_e7ea7242-875c-443f-9661-39bec203c1ee](https://user-images.githubusercontent.com/53471087/106870333-f228e680-670b-11eb-9048-14c1d5a729e7.png)\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n"
-	fmt.Println(filterBracket(str))
+	fmt.Println(str)
+	fmt.Println(filterSquareBracket(str))
+}
+
+func TestFilterBackQuote(t *testing.T) {
+	str := "```ǎ傦眢否畬傮Ȕ炏芭裪```"
+	fmt.Println(str)
+	fmt.Println(filterBackQuote(str))
+}
+
+func TestAll(t *testing.T) {
+	str := "<img> <> [] [<>] () (\"\") ``` ``` "
+	fmt.Println(str)
+	fmt.Println(filterImg(filterSquareBracket(filterBackQuote(str))))
 }