diff --git a/apps/api/src/routes/problem.ts b/apps/api/src/routes/problem.ts
index 5425175..dc8e505 100644
--- a/apps/api/src/routes/problem.ts
+++ b/apps/api/src/routes/problem.ts
@@ -121,12 +121,6 @@ function listItem(
   } satisfies ProblemListItem
 }
 
-/** 题号排序：先按长度再按字面，1001 < 1100 < P026 < SQL09，不会排成 1001、1100、11、2 */
-const displayIdOrder = [
-  asc(sql`length(${schema.problem.displayId})`),
-  asc(schema.problem.displayId),
-]
-
 problemRoutes.get("/problems", optionalAuth, async (c) => {
   const user = c.get("user")
   const limit = queryInteger(c.req.query("limit"), 20, { min: 1, max: 250 })
@@ -169,23 +163,26 @@ problemRoutes.get("/problems", optionalAuth, async (c) => {
     filters.push(notInArray(schema.problem.id, [...states.solved]))
 
   const where = and(...filters)
-  // 默认按最新创建（选了知识点也一样）。旧的排序值（最多提交、画流程图……）落到默认 ——
-  // 类型已经拆成了单独的筛选
+  // 排序值沿用原来的（地址栏里存着的旧链接照样能用），但「最多 / 最少」现在按**人数**排，
+  // 和列表最后一列「做对 / 做过」对得上：submission_number 是做过的人，accepted_number 是做对的人。
+  // 旧的「画流程图 / 语法检查」排序已经拆成类型筛选，传进来落到默认（最新创建）
   const sort = problemListSortSchema.safeParse(c.req.query("sort") ?? "").data ?? ""
-  const effective = sort || "new"
-  const allCounts = effective === "popular" ? await problemUserCounts() : null
-  const popularity = allCounts
+  const byPeople = sort.endsWith("submission_number") || sort.endsWith("accepted_number")
+  const allCounts = byPeople ? await problemUserCounts() : null
+  const people = allCounts
     ? sql`case ${schema.problem.id} ${sql.join(
-        [...allCounts].map(([id, n]) => sql`when ${id} then ${n.solved}`),
+        [...allCounts].map(
+          ([id, n]) =>
+            sql`when ${id} then ${sort.endsWith("accepted_number") ? n.solved : n.tried}`,
+        ),
         sql` `,
       )} else 0 end`
     : null
-  const order =
-    effective === "id"
-      ? displayIdOrder
-      : popularity
-        ? [desc(popularity), ...displayIdOrder]
-        : [desc(schema.problem.createTime)]
+  const order = people
+    ? [sort.startsWith("-") ? desc(people) : asc(people), desc(schema.problem.createTime)]
+    : sort === "create_time"
+      ? [asc(schema.problem.createTime)]
+      : [desc(schema.problem.createTime)]
   const [totalRow] = await db
     .select({ value: countDistinct(schema.problem.id) })
     .from(schema.problem)
diff --git a/apps/web/src/oj/problem/list.vue b/apps/web/src/oj/problem/list.vue
index 3863f15..c95b933 100644
--- a/apps/web/src/oj/problem/list.vue
+++ b/apps/web/src/oj/problem/list.vue
@@ -179,11 +179,14 @@ const countText = computed(() => {
   return { kind: "total" as const, n: total.value }
 })
 
-// ---- 排序：默认按最新创建（选了知识点也一样） ----
+// ---- 排序：和原来同一套，「最多 / 最少」按人数（和最后一列「做对 / 做过」对得上） ----
 const sortOptions = [
   { label: "最新创建", value: "" },
-  { label: "按题号", value: "id" },
-  { label: "最多人做对", value: "popular" },
+  { label: "最早创建", value: "create_time" },
+  { label: "最多人做过", value: "-submission_number" },
+  { label: "最少人做过", value: "submission_number" },
+  { label: "最多人做对", value: "-accepted_number" },
+  { label: "最少人做对", value: "accepted_number" },
 ]
 
 // ---- 出题者 ----
diff --git a/packages/contract/src/problem.ts b/packages/contract/src/problem.ts
index 34af3f0..e4fd85e 100644
--- a/packages/contract/src/problem.ts
+++ b/packages/contract/src/problem.ts
@@ -439,8 +439,18 @@ export const problemListSchema = paginatedSchema(problemListItemSchema)
 /** 题目列表「全部类型」下拉：有参考图 / 画流程图 / 语法要求 */
 export const problemTypeFilterSchema = z.enum(["reference", "flowchart", "ast"])
 
-/** 题目列表的排序。空串是默认：按最新创建 */
-export const problemListSortSchema = z.enum(["", "id", "new", "popular"])
+/**
+ * 题目列表的排序。值沿用原来的（旧链接照样能用）：空串 = 最新创建、create_time = 最早创建，
+ * ±submission_number / ±accepted_number 是做过 / 做对的**人数**，带 - 是从多到少
+ */
+export const problemListSortSchema = z.enum([
+  "",
+  "create_time",
+  "-submission_number",
+  "submission_number",
+  "-accepted_number",
+  "accepted_number",
+])
 
 /**
  * 题目列表顶上那行和左栏的进度。**只说做到了什么**：做对几道、这周新做对几道、