diff --git a/mirai-core-api/src/commonMain/kotlin/message/data/At.kt b/mirai-core-api/src/commonMain/kotlin/message/data/At.kt
index fb0383451..b44bb75dd 100644
--- a/mirai-core-api/src/commonMain/kotlin/message/data/At.kt
+++ b/mirai-core-api/src/commonMain/kotlin/message/data/At.kt
@@ -16,8 +16,10 @@ package net.mamoe.mirai.message.data
 
 import kotlinx.serialization.Serializable
 import net.mamoe.mirai.LowLevelApi
+import net.mamoe.mirai.contact.Group
 import net.mamoe.mirai.contact.Member
 import net.mamoe.mirai.contact.UserOrBot
+import net.mamoe.mirai.contact.nameCardOrNick
 import net.mamoe.mirai.message.code.CodableMessage
 import net.mamoe.mirai.utils.PlannedRemoval
 
@@ -38,13 +40,21 @@ public data class At(
     public override fun contentToString(): String = "@$target"
 
     @Suppress("DeprecatedCallableAddReplaceWith")
-    @Deprecated(
-        "At.display is no longer supported. Please get Member.nameCard by your self.", level = DeprecationLevel.ERROR
-    )
+    @Deprecated("Use getDisplay", ReplaceWith("this.getDisplay()"), DeprecationLevel.ERROR)
     @PlannedRemoval("2.0-M2")
     val display: Nothing
         get() = error("At.display is no longer supported")
 
+    /**
+     * 获取 [At] 发送于指定 [Group] 时会显示的内容.
+     *
+     * 若 [group] 非 `null` 且包含成员 [target], 返回 `"@成员名片或昵称"`. 否则返回 `"@123456"` 其中 123456 表示 [target]
+     */
+    public fun getDisplay(group: Group?): String {
+        val member = group?.get(this.target) ?: return "@$target"
+        return "@${member.nameCardOrNick}"
+    }
+
     public companion object {
         /**
          * 构造一个 [At], 仅供内部使用, 否则可能造成消息无法发出的问题.
diff --git a/mirai-core/src/commonMain/kotlin/contact/GroupImpl.kt b/mirai-core/src/commonMain/kotlin/contact/GroupImpl.kt
index c30fc4185..88b007b2b 100644
--- a/mirai-core/src/commonMain/kotlin/contact/GroupImpl.kt
+++ b/mirai-core/src/commonMain/kotlin/contact/GroupImpl.kt
@@ -298,7 +298,7 @@ internal class GroupImpl(
                 throw EventCancelledException("exception thrown when broadcasting GroupMessagePreSendEvent", it)
             }.message.asMessageChain()
 
-            val length = chain.estimateLength(703) // 阈值为700左右，限制到3的倍数
+            val length = chain.estimateLength(this, 703) // 阈值为700左右，限制到3的倍数
             var imageCnt = 0 // 通过下方逻辑短路延迟计算
 
             if (length > 5000 || chain.count { it is Image }.apply { imageCnt = this } > 50) {
diff --git a/mirai-core/src/commonMain/kotlin/utils/type.kt b/mirai-core/src/commonMain/kotlin/utils/type.kt
index adbb7e7ad..6775f0efd 100644
--- a/mirai-core/src/commonMain/kotlin/utils/type.kt
+++ b/mirai-core/src/commonMain/kotlin/utils/type.kt
@@ -12,10 +12,10 @@
 
 package net.mamoe.mirai.internal.utils
 
+import net.mamoe.mirai.contact.ContactOrBot
 import net.mamoe.mirai.message.data.*
 import net.mamoe.mirai.message.data.AtAll.display
-import kotlin.jvm.JvmMultifileClass
-import kotlin.jvm.JvmName
+import net.mamoe.mirai.utils.safeCast
 
 
 internal fun Int.toIpV4AddressString(): String {
@@ -43,17 +43,17 @@ internal fun String.chineseLength(upTo: Int): Int {
     }
 }
 
-internal fun MessageChain.estimateLength(upTo: Int): Int =
+internal fun MessageChain.estimateLength(target: ContactOrBot, upTo: Int): Int =
     sumUpTo(upTo) { it, up ->
-        it.estimateLength(up)
+        it.estimateLength(target, up)
     }
 
-internal fun SingleMessage.estimateLength(upTo: Int): Int {
+internal fun SingleMessage.estimateLength(target: ContactOrBot, upTo: Int): Int {
     return when (this) {
-        is QuoteReply -> 444 + this.source.originalMessage.estimateLength(upTo) // Magic number
+        is QuoteReply -> 444 + this.source.originalMessage.estimateLength(target, upTo) // Magic number
         is Image -> 260 // Magic number
         is PlainText -> content.chineseLength(upTo)
-        is At -> display.chineseLength(upTo)
+        is At -> this.getDisplay(target.safeCast()).chineseLength(upTo)
         is AtAll -> display.chineseLength(upTo)
         else -> this.toString().chineseLength(upTo)
     }