diff --git a/go.mod b/go.mod
index 2e75901..10fd149 100644
--- a/go.mod
+++ b/go.mod
@@ -1,10 +1,10 @@
 module github.com/yiwen-ai/yiwen-static
 
-go 1.20
+go 1.21
 
 require (
 	github.com/BurntSushi/toml v1.3.2
-	github.com/aliyun/aliyun-oss-go-sdk v2.2.8+incompatible
+	github.com/aliyun/aliyun-oss-go-sdk v2.2.9+incompatible
 	github.com/teambition/gear v1.27.3
 )
 
@@ -12,7 +12,7 @@ require (
 	github.com/go-http-utils/cookie v1.3.1 // indirect
 	github.com/go-http-utils/negotiator v1.0.0 // indirect
 	github.com/teambition/trie-mux v1.5.2 // indirect
-	golang.org/x/net v0.14.0 // indirect
-	golang.org/x/text v0.12.0 // indirect
+	golang.org/x/net v0.15.0 // indirect
+	golang.org/x/text v0.13.0 // indirect
 	golang.org/x/time v0.3.0 // indirect
 )
diff --git a/go.sum b/go.sum
index 5d43a00..0440512 100644
--- a/go.sum
+++ b/go.sum
@@ -2,6 +2,8 @@ github.com/BurntSushi/toml v1.3.2 h1:o7IhLm0Msx3BaB+n3Ag7L8EVlByGnpq14C4YWiu/gL8
 github.com/BurntSushi/toml v1.3.2/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
 github.com/aliyun/aliyun-oss-go-sdk v2.2.8+incompatible h1:6JF1bjhT0WN2srEmijfOFtVWwV91KZ6dJY1/JbdtGrI=
 github.com/aliyun/aliyun-oss-go-sdk v2.2.8+incompatible/go.mod h1:T/Aws4fEfogEE9v+HPhhw+CntffsBHJ8nXQCwKr0/g8=
+github.com/aliyun/aliyun-oss-go-sdk v2.2.9+incompatible h1:Sg/2xHwDrioHpxTN6WMiwbXTpUEinBpHsN7mG21Rc2k=
+github.com/aliyun/aliyun-oss-go-sdk v2.2.9+incompatible/go.mod h1:T/Aws4fEfogEE9v+HPhhw+CntffsBHJ8nXQCwKr0/g8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/dimfeld/httptreemux v5.0.1+incompatible/go.mod h1:rbUlSV+CCpv/SuqUTP/8Bk2O3LyUV436/yaRGkhP6Z0=
@@ -21,8 +23,12 @@ github.com/teambition/trie-mux v1.5.2 h1:ALTagFwKZXkn1vfSRlODlmoZg+NMeWAm4dyBPQI
 github.com/teambition/trie-mux v1.5.2/go.mod h1:0Woh4KOHSN9bkJ66eWmLs8ltrEKw+fnZbFaHFfbMrtc=
 golang.org/x/net v0.14.0 h1:BONx9s002vGdD9umnlX1Po8vOZmrgH34qlHcD1MfK14=
 golang.org/x/net v0.14.0/go.mod h1:PpSgVXXLK0OxS0F31C1/tv6XNguvCrnXIDrFMspZIUI=
+golang.org/x/net v0.15.0 h1:ugBLEUaxABaB5AJqW9enI0ACdci2RUd4eP51NTBvuJ8=
+golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
 golang.org/x/text v0.12.0 h1:k+n5B8goJNdU7hSvEtMUz3d1Q6D/XW4COJSJR6fN0mc=
 golang.org/x/text v0.12.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
+golang.org/x/text v0.13.0 h1:ablQoSUd0tRdKxZewP80B+BaqeKJuVhuRxj/dkrun3k=
+golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
 golang.org/x/time v0.3.0 h1:rg5rLMjNzMS1RkNLzCG38eapWhnYLFYXDXj2gOlr8j4=
 golang.org/x/time v0.3.0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
diff --git a/src/app/app.go b/src/app/app.go
index b4f177b..0e4b3f3 100644
--- a/src/app/app.go
+++ b/src/app/app.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"log"
 	"net/http"
+	"net/url"
 	"strings"
 	"time"
 
@@ -64,7 +65,10 @@ func (gs Groups) lookupFile(path string) (string, []byte) {
 	return "", nil
 }
 
+const Wechat_UA = "MicroMessenger/"
+
 func (gs Groups) Serve(ctx *gear.Context) error {
+	logging.SetTo(ctx, "host", ctx.Host)
 	if ctx.Method != http.MethodGet && ctx.Method != http.MethodHead {
 		status := 200
 		if ctx.Method != http.MethodOptions {
@@ -75,9 +79,30 @@ func (gs Groups) Serve(ctx *gear.Context) error {
 		return ctx.End(status)
 	}
 
+	isWechat := strings.Contains(ctx.GetHeader(gear.HeaderUserAgent), Wechat_UA)
+	// https://www.yiwen.pub/pub/ck1sasaglcahc6fks810?language=zho&by=ke82hfgs3ni
+	if ctx.Host == "www.yiwen.pub" && !isWechat {
+		next := &url.URL{
+			Scheme:   "https",
+			Host:     "www.yiwen.ai",
+			Path:     ctx.Path,
+			RawQuery: ctx.Req.URL.RawQuery,
+		}
+		return ctx.Redirect(next.String())
+	}
+
 	name, file := gs.lookupFile(ctx.Path)
 	if name != "" {
-		handleCookie(ctx)
+		if name == "index.html" {
+			lang := handleContext(ctx)
+			app := "web"
+			if isWechat {
+				app = "wechat"
+			}
+
+			html := fmt.Sprintf(`<html lang="%s" data-app="%s">`, lang, app)
+			file = bytes.Replace(file, []byte("<html>"), []byte(html), 1)
+		}
 		http.ServeContent(ctx.Res, ctx.Req, name, startTime, bytes.NewReader(file))
 	}
 
@@ -132,12 +157,30 @@ func GetVersion() map[string]string {
 	}
 }
 
-func handleCookie(ctx *gear.Context) {
+func handleContext(ctx *gear.Context) (lang string) {
 	logging.SetTo(ctx, "referer", ctx.GetHeader(gear.HeaderReferer))
 	// user preferred language
-	if cookie, _ := ctx.Req.Cookie("lang"); cookie != nil {
-		logging.SetTo(ctx, "lang", cookie.Value)
+	lang = ctx.Query("language")
+	if lang == "" {
+		lang = ctx.Query("lang")
+	}
+	if lang == "" {
+		lang = ctx.GetHeader("x-language")
 	}
+	if lang == "" {
+		if c, _ := ctx.Req.Cookie("lang"); c != nil {
+			lang = c.Value
+		} else if locale := ctx.AcceptLanguage(); locale != "" {
+			if i := strings.IndexAny(locale, "-_"); i > 0 {
+				locale = locale[:i]
+			}
+			lang = locale
+		}
+	}
+
+	lang = Lang639_3(lang)
+	logging.SetTo(ctx, "lang", lang)
+
 	// user preferred currency
 	if cookie, _ := ctx.Req.Cookie("ccy"); cookie != nil {
 		logging.SetTo(ctx, "ccy", cookie.Value)
@@ -146,10 +189,8 @@ func handleCookie(ctx *gear.Context) {
 	// 用户推荐人
 	if cookie, _ := ctx.Req.Cookie("by"); cookie != nil {
 		logging.SetTo(ctx, "by", cookie.Value)
-		return
-	}
-	// 如果 url 中包含用户推荐人，则设置到 cookie
-	if by := ctx.Query("by"); len(by) > 0 && len(by) <= 20 {
+	} else if by := ctx.Query("by"); len(by) > 0 && len(by) <= 20 {
+		// 如果 url 中包含用户推荐人，则设置到 cookie
 		logging.SetTo(ctx, "by", by)
 		http.SetCookie(ctx.Res, &http.Cookie{
 			Name:     "by",
@@ -161,6 +202,7 @@ func handleCookie(ctx *gear.Context) {
 			Domain:   conf.Config.Cookie.Domain,
 			SameSite: http.SameSiteLaxMode,
 		})
-		return
 	}
+
+	return
 }
diff --git a/src/app/languages.go b/src/app/languages.go
new file mode 100644
index 0000000..7385773
--- /dev/null
+++ b/src/app/languages.go
@@ -0,0 +1,28 @@
+package app
+
+import (
+	"encoding/json"
+	"strings"
+)
+
+var Languages [][]string
+
+func init() {
+	if err := json.Unmarshal([]byte(languages), &Languages); err != nil {
+		panic(err)
+	}
+}
+
+func Lang639_3(lang string) string {
+	lang = strings.ToLower(lang)
+
+	for _, vv := range Languages {
+		if vv[0] == lang || vv[1] == lang || strings.ToLower(vv[2]) == lang || strings.ToLower(vv[3]) == lang {
+			return vv[1]
+		}
+	}
+
+	return ""
+}
+
+var languages = `[["ab","abk","Abkhazian","аҧсуа бызшәа\u200e (Aṗsua byzšwa), аҧсшәа\u200e (Aṗsšwa)"],["aa","aar","Afar","Qafar"],["af","afr","Afrikaans","Afrikaans"],["ak","aka","Akan","Akan"],["sq","sqi","Albanian","shqip"],["am","amh","Amharic","አማርኛ"],["ar","ara","Arabic","العربية"],["an","arg","Aragonese","Aragonés"],["hy","hye","Armenian","հայերեն"],["as","asm","Assamese","অসমীয়া"],["av","ava","Avaric","авар мацӏ\u200e (Awar mac̣), магӏарул мацӏ\u200e (Maʿarul mac̣)"],["az","aze","Azerbaijani","azərbaycan"],["bm","bam","Bambara","bamanakan"],["ba","bak","Bashkir","башҡорт теле\u200e (Başķort tele), башҡортса\u200e (Başķortsa)"],["eu","eus","Basque","euskara"],["be","bel","Belarusian","беларуская"],["bn","ben","Bengali","বাংলা"],["bi","bis","Bislama","Bislama"],["bs","bos","Bosnian","bosanski"],["br","bre","Breton","brezhoneg"],["bg","bul","Bulgarian","български"],["my","mya","Burmese","မြန်မာ"],["ca","cat","Catalan","català"],["ch","cha","Chamorro","Chamorru"],["ce","che","Chechen","нохчийн"],["zh","zho","Chinese","中文"],["cu","chu","Church Slavic","церковнослове́нскїй"],["cv","chv","Chuvash","Чӑвашла"],["kw","cor","Cornish","kernewek"],["co","cos","Corsican","Corsu"],["hr","hrv","Croatian","hrvatski"],["cs","ces","Czech","čeština"],["da","dan","Danish","dansk"],["dv","div","Dhivehi","ދިވެހިބަސް"],["nl","nld","Dutch","Nederlands"],["dz","dzo","Dzongkha","རྫོང་ཁ"],["en","eng","English","English"],["eo","epo","Esperanto","esperanto"],["et","est","Estonian","eesti"],["ee","ewe","Ewe","Eʋegbe"],["fo","fao","Faroese","føroyskt"],["fi","fin","Finnish","suomi"],["fr","fra","French","français"],["ff","ful","Fulah","Pulaar"],["gl","glg","Galician","galego"],["lg","lug","Ganda","Luganda"],["ka","kat","Georgian","ქართული"],["de","deu","German","Deutsch"],["gu","guj","Gujarati","ગુજરાતી"],["ht","hat","Haitian","Ayisyen, Kreyòl"],["ha","hau","Hausa","Hausa"],["he","heb","Hebrew","עברית"],["hi","hin","Hindi","हिन्दी"],["hu","hun","Hungarian","magyar"],["is","isl","Icelandic","íslenska"],["ig","ibo","Igbo","Igbo"],["id","ind","Indonesian","Indonesia"],["ia","ina","Interlingua","interlingua"],["iu","iku","Inuktitut","ᐃᓄᒃᑎᑐᑦ"],["ga","gle","Irish","Gaeilge"],["it","ita","Italian","italiano"],["ja","jpn","Japanese","日本語"],["jv","jav","Javanese","Basa Jawa"],["kl","kal","Kalaallisut","kalaallisut"],["kn","kan","Kannada","ಕನ್ನಡ"],["ks","kas","Kashmiri","کٲشُر"],["kk","kaz","Kazakh","қазақ тілі"],["km","khm","Khmer","ខ្មែរ"],["ki","kik","Kikuyu","Gikuyu"],["rw","kin","Kinyarwanda","Kinyarwanda"],["ky","kir","Kirghiz","кыргызча"],["ko","kor","Korean","한국어"],["kj","kua","Kuanyama","Oshikwanyama"],["ku","kur","Kurdish","kurdî"],["lo","lao","Lao","ລາວ"],["lv","lav","Latvian","latviešu"],["li","lim","Limburgan","Limbourgeois, Limburgs"],["ln","lin","Lingala","lingála"],["lt","lit","Lithuanian","lietuvių"],["lu","lub","Luba-Katanga","Tshiluba"],["lb","ltz","Luxembourgish","Lëtzebuergesch"],["mk","mkd","Macedonian","македонски"],["mg","mlg","Malagasy","Malagasy"],["ms","msa","Malay","Melayu"],["ml","mal","Malayalam","മലയാളം"],["mt","mlt","Maltese","Malti"],["gv","glv","Manx","Gaelg"],["mi","mri","Maori","te reo Maori"],["mr","mar","Marathi","मराठी"],["el","ell","Modern Greek","Ελληνικά"],["mn","mon","Mongolian","монгол"],["nv","nav","Navajo","Diné"],["ne","nep","Nepali","नेपाली"],["nd","nde","North Ndebele","isiNdebele"],["se","sme","Northern Sami","davvisámegiella"],["no","nor","Norwegian","Norsk"],["nn","nno","Norwegian Nynorsk","nynorsk"],["ny","nya","Nyanja","Chichewa, chiCheŵa\u200e (Chichewa), chiNyanja"],["oc","oci","Occitan","occitan"],["or","ori","Oriya","ଓଡ଼ିଆ"],["om","orm","Oromo","Oromoo"],["os","oss","Ossetian","ирон"],["pa","pan","Panjabi","ਪੰਜਾਬੀ"],["fa","fas","Persian","فارسی"],["pl","pol","Polish","polski"],["pt","por","Portuguese","português"],["ps","pus","Pushto","پښتو"],["qu","que","Quechua","Runasimi"],["ro","ron","Romanian","română"],["rm","roh","Romansh","rumantsch"],["rn","run","Rundi","Ikirundi"],["ru","rus","Russian","русский"],["sm","smo","Samoan","Gagana Samoa"],["sg","sag","Sango","Sängö"],["sa","san","Sanskrit","संस्कृत भाषा"],["gd","gla","Scottish Gaelic","Gàidhlig"],["sr","srp","Serbian","српски"],["sn","sna","Shona","chiShona"],["ii","iii","Sichuan Yi","ꆈꌠꉙ"],["sd","snd","Sindhi","سنڌي"],["si","sin","Sinhala","සිංහල"],["sk","slk","Slovak","slovenčina"],["sl","slv","Slovenian","slovenščina"],["so","som","Somali","Soomaali"],["nr","nbl","South Ndebele","isiNdebele"],["st","sot","Southern Sotho","Sesotho"],["es","spa","Spanish","español"],["su","sun","Sundanese","Sunda"],["sw","swa","Swahili","Kiswahili"],["ss","ssw","Swati","siSwati"],["sv","swe","Swedish","svenska"],["tl","tgl","Tagalog","Tagalog"],["ty","tah","Tahitian","Reo Tahiti"],["tg","tgk","Tajik","тоҷикӣ"],["ta","tam","Tamil","தமிழ்"],["tt","tat","Tatar","татар"],["te","tel","Telugu","తెలుగు"],["th","tha","Thai","ไทย"],["bo","bod","Tibetan","བོད་སྐད་"],["ti","tir","Tigrinya","ትግርኛ"],["to","ton","Tonga","lea fakatonga"],["ts","tso","Tsonga","Xitsonga"],["tn","tsn","Tswana","Setswana"],["tr","tur","Turkish","Türkçe"],["tk","tuk","Turkmen","Türkmen dili"],["ug","uig","Uighur","ئۇيغۇرچە"],["uk","ukr","Ukrainian","українська"],["ur","urd","Urdu","اردو"],["uz","uzb","Uzbek","o‘zbek"],["ve","ven","Venda","Tshivenḓa"],["vi","vie","Vietnamese","Tiếng Việt"],["cy","cym","Welsh","Cymraeg"],["fy","fry","Western Frisian","Frysk"],["wo","wol","Wolof","Wolof"],["xh","xho","Xhosa","isiXhosa"],["yi","yid","Yiddish","ייִדיש"],["yo","yor","Yoruba","Èdè Yorùbá"],["zu","zul","Zulu","isiZulu"]]`