diff --git a/internal/client/client.go b/internal/client/client.go
index 1d20aed4..6f042876 100644
--- a/internal/client/client.go
+++ b/internal/client/client.go
@@ -164,6 +164,11 @@ func shouldAppendJSONSuffix(path string) bool {
 	if strings.HasSuffix(path, ".json") {
 		return false
 	}
+	// Wiki open endpoints are served by gateway.gitlink.org.cn which does not
+	// accept the .json suffix used by the www.gitlink.org.cn API convention.
+	if strings.Contains(path, "/wiki/open/") {
+		return false
+	}
 	parts := strings.Split(strings.Trim(path, "/"), "/")
 	for i, part := range parts {
 		if part == "raw" && i >= 2 && i+2 < len(parts) {
diff --git a/shortcuts/wiki/wiki.go b/shortcuts/wiki/wiki.go
index a65594d8..c432001e 100644
--- a/shortcuts/wiki/wiki.go
+++ b/shortcuts/wiki/wiki.go
@@ -219,12 +219,26 @@ func runWrite(method, path string, contentRequired bool) func(ctx *common.Runtim
 	}
 }
 
-// prepare resolves owner/repo and the numeric project ID for wiki requests.
+// prepare resolves owner/repo and the numeric project ID for wiki requests,
+// and switches the API base URL to the gateway endpoint that hosts wiki APIs.
 func prepare(ctx *common.RuntimeContext) (int64, error) {
 	if err := ctx.ResolveOwnerRepo(); err != nil {
 		return 0, err
 	}
-	return resolveProjectID(ctx)
+	// Resolve project ID first (requires www base URL for /owner/repo endpoint).
+	projectID, err := resolveProjectID(ctx)
+	if err != nil {
+		return 0, err
+	}
+	// Switch to gateway for wiki API calls (/wiki/open/* only available there).
+	switchToGateway(ctx)
+	return projectID, nil
+}
+
+// switchToGateway replaces the www subdomain with gateway in the API base URL.
+// Wiki endpoints (/wiki/open/*) are only available on gateway.gitlink.org.cn.
+func switchToGateway(ctx *common.RuntimeContext) {
+	ctx.Client.BaseURL = strings.Replace(ctx.Client.BaseURL, "www.gitlink.org.cn", "gateway.gitlink.org.cn", 1)
 }
 
 // baseQuery returns the owner/repo/projectId query shared by read endpoints.
diff --git a/shortcuts/wiki/wiki_test.go b/shortcuts/wiki/wiki_test.go
index 2451b7b0..99013d63 100644
--- a/shortcuts/wiki/wiki_test.go
+++ b/shortcuts/wiki/wiki_test.go
@@ -64,7 +64,7 @@ func TestWikiListResolvesProjectID(t *testing.T) {
 		case "/alice/demo.json":
 			sawRepo = true
 			writeJSON(w, map[string]interface{}{"id": float64(4242)})
-		case "/wiki/open/wikiPages.json":
+		case "/wiki/open/wikiPages":
 			sawList = true
 			if got := r.URL.Query().Get("projectId"); got != "4242" {
 				t.Fatalf("projectId = %q, want 4242", got)
@@ -89,7 +89,7 @@ func TestWikiListResolvesProjectID(t *testing.T) {
 
 func TestWikiViewExplicitProjectID(t *testing.T) {
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.Path != "/wiki/open/getWiki.json" {
+		if r.URL.Path != "/wiki/open/getWiki" {
 			t.Fatalf("unexpected path: %s", r.URL.Path)
 		}
 		if got := r.URL.Query().Get("pageName"); got != "Home" {
@@ -123,7 +123,7 @@ func TestWikiViewMissingPage(t *testing.T) {
 
 func TestWikiCreateEncodesContent(t *testing.T) {
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.Path != "/wiki/open/createWiki.json" {
+		if r.URL.Path != "/wiki/open/createWiki" {
 			t.Fatalf("unexpected path: %s", r.URL.Path)
 		}
 		body := decodeBody(t, r)
@@ -185,7 +185,7 @@ func TestWikiCreateContentFile(t *testing.T) {
 
 func TestWikiUpdateWithoutContent(t *testing.T) {
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.Path != "/wiki/open/updateWiki.json" {
+		if r.URL.Path != "/wiki/open/updateWiki" {
 			t.Fatalf("unexpected path: %s", r.URL.Path)
 		}
 		body := decodeBody(t, r)
@@ -221,7 +221,7 @@ func TestWikiDeleteDryRun(t *testing.T) {
 
 func TestWikiDelete(t *testing.T) {
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.Path != "/wiki/open/deleteWiki.json" {
+		if r.URL.Path != "/wiki/open/deleteWiki" {
 			t.Fatalf("unexpected path: %s", r.URL.Path)
 		}
 		if r.Method != http.MethodDelete {