diff --git a/regx/contain.go b/regx/contain.go
new file mode 100644
index 0000000..79d6533
--- /dev/null
+++ b/regx/contain.go
@@ -0,0 +1,159 @@
+package regx
+
+import (
+	"encoding/json"
+	"regexp"
+	"strconv"
+	"unicode"
+)
+
+// ContainChinese 验证字符串是否包含中文字符
+func (rr *Regx) ContainChinese(s string) bool {
+	var containChineseRegexMatcher = regexp.MustCompile("[\u4e00-\u9fa5]")
+	return containChineseRegexMatcher.MatchString(s)
+}
+
+// IsAlpha checks if the string contains only letters (a-zA-Z)
+func (rr *Regx) IsAlpha(str string) bool {
+	var isAlphaRegexMatcher = regexp.MustCompile(`^[a-zA-Z]+$`)
+	return isAlphaRegexMatcher.MatchString(str)
+}
+
+// IsAllUpper check if the string is all upper case letters A-Z
+func (rr *Regx) IsAllUpper(str string) bool {
+	for _, r := range str {
+		if !unicode.IsUpper(r) {
+			return false
+		}
+	}
+	return str != ""
+}
+
+// IsAllLower check if the string is all lower case letters a-z
+func (rr *Regx) IsAllLower(str string) bool {
+	for _, r := range str {
+		if !unicode.IsLower(r) {
+			return false
+		}
+	}
+	return str != ""
+}
+
+// ContainUpper check if the string contain at least one upper case letter A-Z
+func (rr *Regx) ContainUpper(str string) bool {
+	for _, r := range str {
+		if unicode.IsUpper(r) && unicode.IsLetter(r) {
+			return true
+		}
+	}
+	return false
+}
+
+// ContainLower check if the string contain at least one lower case letter A-Z
+func (rr *Regx) ContainLower(str string) bool {
+	for _, r := range str {
+		if unicode.IsLower(r) && unicode.IsLetter(r) {
+			return true
+		}
+	}
+	return false
+}
+
+// ContainLetter check if the string contain at least one letter
+func (rr *Regx) ContainLetter(str string) bool {
+	var containLetterRegexMatcher = regexp.MustCompile(`[a-zA-Z]`)
+	return containLetterRegexMatcher.MatchString(str)
+}
+
+// IsJSON checks if the string is valid JSON
+func (rr *Regx) IsJSON(str string) bool {
+	var js json.RawMessage
+	return json.Unmarshal([]byte(str), &js) == nil
+}
+
+// IsFloatStr check if the string can convert to a float.
+func (rr *Regx) IsFloatStr(str string) bool {
+	_, e := strconv.ParseFloat(str, 64)
+	return e == nil
+}
+
+// IsIntStr check if the string can convert to a integer.
+func (rr *Regx) IsIntStr(str string) bool {
+	var isIntStrRegexMatcher = regexp.MustCompile(`^[\+-]?\d+$`)
+	return isIntStrRegexMatcher.MatchString(str)
+}
+
+// IsNumberStr check if the string can convert to a number.
+func (rr *Regx) IsNumberStr(s string) bool {
+	return rr.IsIntStr(s) || rr.IsFloatStr(s)
+}
+
+// IsChineseIdNum check if the string is chinese id number.
+func IsChineseIdNum(id string) bool {
+	var isChineseIdNumRegexMatcher *regexp.Regexp = regexp.MustCompile(`^[1-9]\d{5}(18|19|20|21|22)\d{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)\d{3}[0-9Xx]$`)
+	return isChineseIdNumRegexMatcher.MatchString(id)
+}
+
+// IsCreditCard check if the string is credit card.
+func IsCreditCard(creditCart string) bool {
+	var isCreditCardRegexMatcher *regexp.Regexp = regexp.MustCompile(`^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|(222[1-9]|22[3-9][0-9]|2[3-6][0-9]{2}|27[01][0-9]|2720)[0-9]{12}|6(?:011|5[0-9][0-9])[0-9]{12}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|(?:2131|1800|35\\d{3})\\d{11}|6[27][0-9]{14})$`)
+	return isCreditCardRegexMatcher.MatchString(creditCart)
+}
+
+// IsBase64 check if the string is base64 string.
+func IsBase64(base64 string) bool {
+	var isBase64RegexMatcher *regexp.Regexp = regexp.MustCompile(`^(?:[A-Za-z0-9+\\/]{4})*(?:[A-Za-z0-9+\\/]{2}==|[A-Za-z0-9+\\/]{3}=|[A-Za-z0-9+\\/]{4})$`)
+	return isBase64RegexMatcher.MatchString(base64)
+}
+
+// IsEmptyString check if the string is empty.
+func IsEmptyString(str string) bool {
+	return len(str) == 0
+}
+
+// IsRegexMatch check if the string match the regexp
+func IsRegexMatch(str, regex string) bool {
+	reg := regexp.MustCompile(regex)
+	return reg.MatchString(str)
+}
+
+// IsStrongPassword check if the string is strong password, if len(password) is less than the length param, return false
+// Strong password: alpha(lower+upper) + number + special chars(!@#$%^&*()?><)
+func IsStrongPassword(password string, length int) bool {
+	if len(password) < length {
+		return false
+	}
+	var num, lower, upper, special bool
+	for _, r := range password {
+		switch {
+		case unicode.IsDigit(r):
+			num = true
+		case unicode.IsUpper(r):
+			upper = true
+		case unicode.IsLower(r):
+			lower = true
+		case unicode.IsSymbol(r), unicode.IsPunct(r):
+			special = true
+		}
+	}
+
+	return num && lower && upper && special
+}
+
+// IsWeakPassword check if the string is weak password
+// Weak password: only letter or only number or letter + number
+func IsWeakPassword(password string) bool {
+	var num, letter, special bool
+	for _, r := range password {
+		switch {
+		case unicode.IsDigit(r):
+			num = true
+		case unicode.IsLetter(r):
+			letter = true
+		case unicode.IsSymbol(r), unicode.IsPunct(r):
+			special = true
+		}
+	}
+
+	return (num || letter) && !special
+}
diff --git a/regx/contain_test.go b/regx/contain_test.go
new file mode 100644
index 0000000..afa847a
--- /dev/null
+++ b/regx/contain_test.go
@@ -0,0 +1,28 @@
+package regx
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestRegx_ContainChinese(t *testing.T) {
+	fmt.Println(regx.ContainChinese("中文"))
+	fmt.Println(regx.ContainChinese("abc"))
+	fmt.Println(regx.ContainChinese("中文abc"))
+}
+
+func TestRegx_Contains(t *testing.T) {
+	fmt.Println(regx.IsAlpha("中文"))
+	fmt.Println(regx.IsAlpha("abc"))
+	fmt.Println(regx.IsAlpha("中文abc"))
+	fmt.Println(regx.IsAllUpper("中文"))
+	fmt.Println(regx.IsAllUpper("abc"))
+	fmt.Println(regx.IsAllUpper("中文abc"))
+}
+
+func TestRegx_IsFloatStr(t *testing.T) {
+	fmt.Println(regx.IsFloatStr("1.1"))
+	fmt.Println(regx.IsFloatStr("1.1.1"))
+	fmt.Println(regx.IsFloatStr("3"))
+	fmt.Println(regx.IsJSON("{\"name\":\"中文\"}"))
+}
diff --git a/regx/ip.go b/regx/ip.go
index 1f02ddb..204834e 100644
--- a/regx/ip.go
+++ b/regx/ip.go
@@ -2,17 +2,12 @@ package regx
 
 import (
 	"net"
+	"net/url"
 	"regexp"
+	"strconv"
+	"strings"
 )
 
-func (rr *Regx) IsIp(address string) bool {
-	ip := net.ParseIP(address)
-	if ip != nil {
-		return true
-	}
-	return false
-
-}
 func (rr *Regx) IsIpRegx(address string) bool {
 	ipReg := `^((0|[1-9]\d?|1\d\d|2[0-4]\d|25[0-5])\.){3}(0|[1-9]\d?|1\d\d|2[0-4]\d|25[0-5])$`
 	r, _ := regexp.Compile(ipReg)
@@ -22,3 +17,61 @@ func (rr *Regx) IsIpRegx(address string) bool {
 	}
 	return false
 }
+
+// IsIp check if the string is a ip address.
+func (rr *Regx) IsIp(ipstr string) bool {
+	ip := net.ParseIP(ipstr)
+	return ip != nil
+}
+
+// IsIpV4 check if the string is a ipv4 address.
+func (rr *Regx) IsIpV4(ipstr string) bool {
+	ip := net.ParseIP(ipstr)
+	if ip == nil {
+		return false
+	}
+	return strings.Contains(ipstr, ".")
+}
+
+// IsIpV6 check if the string is a ipv6 address.
+func (rr *Regx) IsIpV6(ipstr string) bool {
+	ip := net.ParseIP(ipstr)
+	if ip == nil {
+		return false
+	}
+	return strings.Contains(ipstr, ":")
+}
+
+// IsPort check if the string is a valid net port.
+func (rr *Regx) IsPort(str string) bool {
+	if i, err := strconv.ParseInt(str, 10, 64); err == nil && i > 0 && i < 65536 {
+		return true
+	}
+	return false
+}
+
+// IsUrl check if the string is url.
+func (rr *Regx) IsUrl(str string) bool {
+	var isUrlRegexMatcher *regexp.Regexp = regexp.MustCompile(`^((ftp|http|https?):\/\/)?(\S+(:\S*)?@)?((([1-9]\d?|1\d\d|2[01]\d|22[0-3])(\.(1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.([0-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(([a-zA-Z0-9]+([-\.][a-zA-Z0-9]+)*)|((www\.)?))?(([a-z\x{00a1}-\x{ffff}0-9]+-?-?)*[a-z\x{00a1}-\x{ffff}0-9]+)(?:\.([a-z\x{00a1}-\x{ffff}]{2,}))?))(:(\d{1,5}))?((\/|\?|#)[^\s]*)?$`)
+	if str == "" || len(str) >= 2083 || len(str) <= 3 || strings.HasPrefix(str, ".") {
+		return false
+	}
+	u, err := url.Parse(str)
+	if err != nil {
+		return false
+	}
+	if strings.HasPrefix(u.Host, ".") {
+		return false
+	}
+	if u.Host == "" && (u.Path != "" && !strings.Contains(u.Path, ".")) {
+		return false
+	}
+
+	return isUrlRegexMatcher.MatchString(str)
+}
+
+// IsDns check if the string is dns.
+func (rr *Regx) IsDns(dns string) bool {
+	var isDnsRegexMatcher *regexp.Regexp = regexp.MustCompile(`^[a-zA-Z]([a-zA-Z0-9\-]+[\.]?)*[a-zA-Z0-9]$`)
+	return isDnsRegexMatcher.MatchString(dns)
+}
diff --git a/regx/ip_test.go b/regx/ip_test.go
index f74f2fd..f8ad616 100644
--- a/regx/ip_test.go
+++ b/regx/ip_test.go
@@ -14,3 +14,14 @@ func TestRegx_IsIp(t *testing.T) {
 	fmt.Println(regx.IsIpRegx("114.114.114.314"))
 	fmt.Println(regx.IsIpRegx("www.baidu.com"))
 }
+
+func TestRegx_IsIpV4(t *testing.T) {
+	fmt.Println(regx.IsIpV4("222.222.222.2242"))
+	fmt.Println(regx.IsIpV6("222.222.222.2242"))
+
+}
+func TestRegx_IsDns(t *testing.T) {
+	fmt.Println(regx.IsDns("www.baidu.com"))
+	fmt.Println(regx.IsDns("www.baidu.com.cn"))
+	fmt.Println(regx.IsDns("www.baidu.com.cn.cn"))
+}
diff --git a/regx/mail.go b/regx/mail.go
index bc93284..46d1349 100644
--- a/regx/mail.go
+++ b/regx/mail.go
@@ -8,3 +8,9 @@ func (rr *Regx) IsMail(mail string) bool {
 	reg := regexp.MustCompile(pattern)
 	return reg.MatchString(mail)
 }
+
+// IsEmail check if the string is a email address.
+func (rr *Regx) IsEmail(email string) bool {
+	var isEmailRegexMatcher = regexp.MustCompile(`\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*`)
+	return isEmailRegexMatcher.MatchString(email)
+}
diff --git a/regx/mail_test.go b/regx/mail_test.go
index fac79ea..a4c7fbb 100644
--- a/regx/mail_test.go
+++ b/regx/mail_test.go
@@ -12,3 +12,11 @@ func TestRegx_IsMail(t *testing.T) {
 	fmt.Println(regx.IsMail("www@baidu.com.cn"))
 
 }
+
+func TestRegx_IsEmail(t *testing.T) {
+	fmt.Println(regx.IsEmail("www.baidu.com"))
+	fmt.Println(regx.IsEmail("www@baiducom"))
+	fmt.Println(regx.IsEmail("www@baidu.com"))
+	fmt.Println(regx.IsEmail("www@baidu.com.cn"))
+
+}
diff --git a/regx/phone.go b/regx/phone.go
index 58cb9d3..f1b0c65 100644
--- a/regx/phone.go
+++ b/regx/phone.go
@@ -8,3 +8,16 @@ func (rr *Regx) IsPhone(phone string) bool {
 	reg := regexp.MustCompile(regular)
 	return reg.MatchString(phone)
 }
+
+// IsChineseMobile check if the string is chinese mobile number.
+func (rr *Regx) IsChineseMobile(mobileNum string) bool {
+	var isChineseMobileRegexMatcher = regexp.MustCompile("^((13[0-9])|(14[5,7])|(15[0-3,5-9])|(17[0,3,5-8])|(18[0-9])|166|198|199|(147))\\d{8}$")
+	return isChineseMobileRegexMatcher.MatchString(mobileNum)
+}
+
+// IsChinesePhone check if the string is chinese phone number.
+// Valid chinese phone is xxx-xxxxxxxx or xxxx-xxxxxxx
+func (rr *Regx) IsChinesePhone(phone string) bool {
+	var isChinesePhoneRegexMatcher = regexp.MustCompile(`\d{3}-\d{8}|\d{4}-\d{7}`)
+	return isChinesePhoneRegexMatcher.MatchString(phone)
+}
diff --git a/regx/phone_test.go b/regx/phone_test.go
index 33fd02c..2691749 100644
--- a/regx/phone_test.go
+++ b/regx/phone_test.go
@@ -10,3 +10,15 @@ func TestRegx_IsPhone(t *testing.T) {
 	fmt.Println(regx.IsPhone("188888888888888"))
 	fmt.Println(regx.IsPhone("28888888888"))
 }
+
+func TestRegx_IsChineseMobile(t *testing.T) {
+	fmt.Println(regx.IsChineseMobile("18888888888"))
+	fmt.Println(regx.IsChineseMobile("188888888888888"))
+	fmt.Println(regx.IsChineseMobile("28888888888"))
+}
+
+func TestRegx_IsChinesePhone(t *testing.T) {
+	fmt.Println(regx.IsChinesePhone("622-888888888"))
+	fmt.Println(regx.IsChinesePhone("188888888888888"))
+	fmt.Println(regx.IsChinesePhone("28888888888"))
+}