diff --git a/go.mod b/go.mod
index f6672c0..ee071a0 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/Life-USTC/CLI
 go 1.26.0
 
 require (
-	github.com/Life-USTC/client-core v0.3.0
+	github.com/Life-USTC/client-core v0.4.0
 	github.com/PuerkitoBio/goquery v1.13.0
 	github.com/charmbracelet/bubbles v1.0.0
 	github.com/charmbracelet/bubbletea v1.3.10
diff --git a/go.sum b/go.sum
index bec693d..423732c 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,5 @@
-github.com/Life-USTC/client-core v0.3.0 h1:hpTnY1x6CIVQDIH0PoZdg7/9K+BEpaSss3BlaVdCHWs=
-github.com/Life-USTC/client-core v0.3.0/go.mod h1:2SgYKZ3hbEFEigNGPdbfFS2m149evVw2t/mEjA/S/LM=
+github.com/Life-USTC/client-core v0.4.0 h1:3Bif0F0mMt4EtievcIpGEeLHFnBnY4C2XP2byGwPySg=
+github.com/Life-USTC/client-core v0.4.0/go.mod h1:2SgYKZ3hbEFEigNGPdbfFS2m149evVw2t/mEjA/S/LM=
 github.com/PuerkitoBio/goquery v1.13.0 h1:mqHbjD7Jmnul4DTR24LKTjo1uUmHUh072kteGV+xpFM=
 github.com/PuerkitoBio/goquery v1.13.0/go.mod h1:Hip5mdBL8K2wEGKJdr27sRaNwIdDajmCwB/ExUPwW+g=
 github.com/RaveNoX/go-jsoncommentstrip v1.0.0/go.mod h1:78ihd09MekBnJnxpICcwzCMzGrKSKYe4AqU6PDYYpjk=
diff --git a/internal/cmd/youngutil/youngutil.go b/internal/cmd/youngutil/youngutil.go
index 0e7b8e9..f40d89c 100644
--- a/internal/cmd/youngutil/youngutil.go
+++ b/internal/cmd/youngutil/youngutil.go
@@ -12,6 +12,7 @@ import (
 
 	"github.com/Life-USTC/CLI/internal/cmd/cmdutil"
 	"github.com/Life-USTC/client-core/calendar"
+	corepagination "github.com/Life-USTC/client-core/pagination"
 )
 
 const (
@@ -101,8 +102,9 @@ func FetchAllPages(
 		return nil, fmt.Errorf("page size must be positive")
 	}
 
+	progress := corepagination.NewProgress(1)
 	firstParams := cloneValues(params)
-	firstParams.Set("page", "1")
+	firstParams.Set("page", strconv.Itoa(progress.NextPage()))
 	firstParams.Set("pageSize", strconv.Itoa(pageSize))
 	first, err := fetch(ctx, firstParams)
 	if err != nil {
@@ -131,11 +133,13 @@ func FetchAllPages(
 		if len(rows) != 0 || totalPages > 1 {
 			return nil, fmt.Errorf("%s returned inconsistent empty pagination", path)
 		}
+		progress = progress.AfterPage(len(rows), false)
 	} else {
 		if totalPages < 1 {
 			return nil, fmt.Errorf("%s returned no pages for %d results", path, total)
 		}
-		for page := 2; page <= totalPages; page++ {
+		progress = progress.AfterPage(len(rows), totalPages > 1)
+		for page := progress.NextPage(); page != 0; page = progress.NextPage() {
 			pageParams := cloneValues(params)
 			pageParams.Set("page", strconv.Itoa(page))
 			pageParams.Set("pageSize", strconv.Itoa(pageSize))
@@ -160,10 +164,11 @@ func FetchAllPages(
 				}
 			}
 			rows = append(rows, pageResult.Rows...)
+			progress = progress.AfterPage(len(pageResult.Rows), page < totalPages)
 		}
 	}
-	if len(rows) != total {
-		return nil, fmt.Errorf("%s returned %d of %d results", path, len(rows), total)
+	if progress.ReceivedCount() != total {
+		return nil, fmt.Errorf("%s returned %d of %d results", path, progress.ReceivedCount(), total)
 	}
 
 	result := cmdutil.NewListResult(first, key)
@@ -171,7 +176,7 @@ func FetchAllPages(
 	if m := cmdutil.AsMap(result.Raw); m != nil {
 		if pg := cmdutil.AsMap(m["pagination"]); pg != nil {
 			pg["page"] = 1
-			resultPageSize := len(rows)
+			resultPageSize := progress.ReceivedCount()
 			if resultPageSize == 0 {
 				resultPageSize = pageSize
 			}
diff --git a/internal/cmd/youngutil/youngutil_test.go b/internal/cmd/youngutil/youngutil_test.go
index 1ee712f..fb6fa35 100644
--- a/internal/cmd/youngutil/youngutil_test.go
+++ b/internal/cmd/youngutil/youngutil_test.go
@@ -6,6 +6,8 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"net/url"
+	"reflect"
+	"strings"
 	"testing"
 	"time"
 
@@ -112,3 +114,91 @@ func TestFetchAllPagesRejectsIncompleteResponse(t *testing.T) {
 		t.Fatal("FetchAllPages accepted an incomplete response")
 	}
 }
+
+func TestFetchAllPagesPreservesPaginationPolicies(t *testing.T) {
+	page := func(total, pages int, ids ...string) any {
+		rows := make([]any, len(ids))
+		for i, id := range ids {
+			rows[i] = map[string]any{"youngId": id}
+		}
+		return map[string]any{"data": rows, "pagination": map[string]any{"total": total, "totalPages": pages}}
+	}
+	tests := []struct {
+		name      string
+		responses []any
+		wantPages []string
+		wantCount int
+		wantError string
+	}{
+		{"empty zero pages", []any{page(0, 0)}, []string{"1"}, 0, ""},
+		{"empty one page", []any{page(0, 1)}, []string{"1"}, 0, ""},
+		{"empty middle page", []any{page(3, 3, "a"), page(3, 3), page(3, 3, "b", "c")}, []string{"1", "2", "3"}, 3, ""},
+		{"empty total with rows", []any{page(0, 1, "a")}, []string{"1"}, 0, "inconsistent empty pagination"},
+		{"empty total with more pages", []any{page(0, 2)}, []string{"1"}, 0, "inconsistent empty pagination"},
+		{"nonempty total without pages", []any{page(1, 0)}, []string{"1"}, 0, "returned no pages"},
+		{"page count limit", []any{page(1, 10001)}, []string{"1"}, 0, "invalid page count"},
+		{"changed total", []any{page(3, 2, "a"), page(4, 2, "b")}, []string{"1", "2"}, 0, "changed pagination"},
+		{"changed page count", []any{page(3, 2, "a"), page(3, 3, "b")}, []string{"1", "2"}, 0, "changed pagination"},
+		{"duplicate first page", []any{page(3, 2, "a", "a")}, []string{"1"}, 0, "duplicate youngId"},
+		{"duplicate later page", []any{page(3, 2, "a"), page(3, 2, "a", "b")}, []string{"1", "2"}, 0, "duplicate youngId"},
+		{"empty ID", []any{page(1, 1, "")}, []string{"1"}, 0, "row without youngId"},
+		{"oversized later page", []any{page(4, 2, "a"), page(4, 2, "b", "c", "d")}, []string{"1", "2"}, 0, "oversized page"},
+		{"incomplete total", []any{page(3, 2, "a"), page(3, 2, "b")}, []string{"1", "2"}, 0, "returned 2 of 3 results"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var requested []string
+			params := url.Values{"module": {"智"}, "active": {"false"}}
+			data, err := FetchAllPages(t.Context(), func(_ context.Context, query url.Values) (any, error) {
+				requested = append(requested, query.Get("page"))
+				if query.Get("pageSize") != "2" || query.Get("module") != "智" || query.Get("active") != "false" {
+					t.Fatalf("query = %v", query)
+				}
+				if len(requested) > len(tt.responses) {
+					t.Fatalf("unexpected extra page: %v", requested)
+				}
+				return tt.responses[len(requested)-1], nil
+			}, "/events", params, "data", 2, "youngId")
+			if !reflect.DeepEqual(requested, tt.wantPages) {
+				t.Fatalf("requested = %v, want %v", requested, tt.wantPages)
+			}
+			if params.Has("page") || params.Has("pageSize") {
+				t.Fatalf("caller parameters changed: %v", params)
+			}
+			if tt.wantError != "" {
+				if err == nil || !strings.Contains(err.Error(), tt.wantError) || data != nil {
+					t.Fatalf("data = %#v, err = %v; want no partial data and %q", data, err, tt.wantError)
+				}
+				return
+			}
+			if err != nil {
+				t.Fatal(err)
+			}
+			result := data.(map[string]any)
+			if len(result["data"].([]any)) != tt.wantCount {
+				t.Fatalf("data = %#v", result)
+			}
+			pagination := result["pagination"].(map[string]any)
+			if pagination["page"] != 1 || pagination["totalPages"] != 1 || pagination["total"] != tt.wantCount {
+				t.Fatalf("pagination = %#v", pagination)
+			}
+		})
+	}
+}
+
+func TestFetchAllIfUnpagedKeepsExplicitSinglePage(t *testing.T) {
+	for _, params := range []url.Values{{"page": {"2"}}, {"pageSize": {"1"}}} {
+		calls := 0
+		payload := map[string]any{"data": []any{}, "pagination": map[string]any{"page": 2, "total": 9, "totalPages": 9}}
+		data, err := FetchAllIfUnpaged(t.Context(), func(_ context.Context, query url.Values) (any, error) {
+			calls++
+			if !reflect.DeepEqual(query, params) {
+				t.Fatalf("query = %v, want %v", query, params)
+			}
+			return payload, nil
+		}, "/events", params, "data", 2, "youngId")
+		if err != nil || calls != 1 || !reflect.DeepEqual(data, payload) {
+			t.Fatalf("calls = %d, data = %#v, err = %v", calls, data, err)
+		}
+	}
+}