diff --git a/logic/GameClass/GameObj/Areas/Construction.cs b/logic/GameClass/GameObj/Areas/Construction.cs
index 39070846..9c8bf3ee 100644
--- a/logic/GameClass/GameObj/Areas/Construction.cs
+++ b/logic/GameClass/GameObj/Areas/Construction.cs
@@ -5,6 +5,7 @@ namespace GameClass.GameObj.Areas;
 
 public class Construction : Immovable
 {
+    public AtomicLong TeamID { get; } = new(long.MaxValue);
     public LongInTheVariableRange HP { get; } = new LongInTheVariableRange(0, GameData.CommunityHP);
     public override bool IsRigid => constructionType == ConstructionType.Community;
     public override ShapeType Shape => ShapeType.Square;
@@ -23,6 +24,7 @@ public bool Construct(int constructSpeed, ConstructionType constructionType, Shi
         }
         if (this.constructionType == ConstructionType.Null || this.HP == 0)
         {
+            this.TeamID.SetReturnOri(ship.TeamID);
             this.constructionType = constructionType;
             switch (constructionType)
             {
diff --git a/logic/GameClass/GameObj/Team.cs b/logic/GameClass/GameObj/Team.cs
index 66470e9f..c594911a 100644
--- a/logic/GameClass/GameObj/Team.cs
+++ b/logic/GameClass/GameObj/Team.cs
@@ -12,8 +12,8 @@ public class Team(Home home)
         public const long invalidTeamID = long.MaxValue;
         public const long noneTeamID = long.MinValue;
         private readonly List<Ship> shipList = new(GameData.MaxShipNum);
-        private readonly Dictionary<uint, XY> birthPointList = [];
-        public Dictionary<uint, XY> BirthPointList => birthPointList;
+        private readonly List<XY> birthPointList = new();
+        public List<XY> BirthPointList => birthPointList;
         private Home home = home;
         public AtomicLong Money { get; } = new AtomicLong(0);
         public AtomicLong Score { get; } = new AtomicLong(0);
@@ -116,7 +116,5 @@ public long[] GetShipIDs()
             }
             return shipIDs;
         }
-        public void UpdateBirthPoint()
-        { }
     }
 }
diff --git a/logic/Gaming/Game.cs b/logic/Gaming/Game.cs
index 1905401a..9386d843 100644
--- a/logic/Gaming/Game.cs
+++ b/logic/Gaming/Game.cs
@@ -9,11 +9,11 @@ namespace Gaming
 {
     public partial class Game
     {
-        public struct ShipInitInfo(long teamID, long playerID, uint birthPoint, ShipType shipType)
+        public struct ShipInitInfo(long teamID, long playerID, XY birthPoint, ShipType shipType)
         {
             public long teamID = teamID;
             public long playerID = playerID;
-            public uint birthPoint = birthPoint;
+            public XY birthPoint = birthPoint;
             public ShipType shipType = shipType;
         }
         private readonly List<Team> teamList;
@@ -27,7 +27,25 @@ public long AddShip(ShipInitInfo shipInitInfo)
                 return GameObj.invalidID;
             }
             // 由于BirthPoint实质上是可变且每支队伍不同的，所以暂时把它放到Team里？
-            XY pos = teamList[(int)shipInitInfo.teamID].BirthPointList[shipInitInfo.birthPoint];
+            XY pos = shipInitInfo.birthPoint;
+            bool validBirthPoint = false;
+            foreach (XY birthPoint in teamList[(int)shipInitInfo.teamID].BirthPointList)
+            {
+                if (GameData.ApproachToInteract(pos, birthPoint) && pos != birthPoint)
+                {
+                    validBirthPoint = true;
+                    break;
+                }
+            }
+            if (gameMap.ProtoGameMap[pos.x, pos.y] != (uint)PlaceType.Null &&
+                gameMap.ProtoGameMap[pos.x, pos.y] != (uint)PlaceType.Shadow)
+            {
+                validBirthPoint = false;
+            }
+            if (!validBirthPoint)
+            {
+                return GameObj.invalidID;
+            }
             Ship? newShip = shipManager.AddShip(pos, shipInitInfo.teamID, shipInitInfo.playerID, shipInitInfo.shipType);
             if (newShip == null)
             {
@@ -128,6 +146,44 @@ public long GetTeamScore(long teamID)
                 return -1;
             return teamList[(int)teamID].Score;
         }
+        public void UpdateBirthPoint()
+        {
+            foreach (Construction construction in gameMap.GameObjDict[GameObjType.Construction].Cast<Construction>())
+            {
+                if (construction.ConstructionType == ConstructionType.Community)
+                {
+                    bool exist = false;
+                    foreach (XY birthPoint in teamList[(int)construction.TeamID].BirthPointList)
+                    {
+                        if (construction.Position == birthPoint)
+                        {
+                            exist = true;
+                            break;
+                        }
+                    }
+                    if (!exist)
+                    {
+                        teamList[(int)construction.TeamID].BirthPointList.Add(construction.Position);
+                    }
+                }
+            }
+            foreach (Team team in teamList)
+            {
+                foreach (XY birthPoint in team.BirthPointList)
+                {
+                    foreach (Construction construction in gameMap.GameObjDict[GameObjType.Construction].Cast<Construction>())
+                    {
+                        if (construction.Position == birthPoint)
+                        {
+                            if (construction.ConstructionType != ConstructionType.Community || construction.TeamID != team.TeamID)
+                            {
+                                team.BirthPointList.Remove(birthPoint);
+                            }
+                        }
+                    }
+                }
+            }
+        }
         public Game(uint[,] mapResource, int numOfTeam)
         {
             gameMap = new(mapResource);
@@ -141,6 +197,7 @@ public Game(uint[,] mapResource, int numOfTeam)
                 if (gameObj.Type == GameObjType.Home)
                 {
                     teamList.Add(new Team((Home)gameObj));
+                    teamList.Last().BirthPointList.Add(gameObj.Position);
                 }
                 if (teamList.Count == numOfTeam)
                 {
diff --git a/logic/Preparation/Utility/GameData.cs b/logic/Preparation/Utility/GameData.cs
index 8af558da..34f83fc3 100644
--- a/logic/Preparation/Utility/GameData.cs
+++ b/logic/Preparation/Utility/GameData.cs
@@ -14,9 +14,9 @@ public static class GameData
         public const int TolerancesLength = 3;
         public const int AdjustLength = 3;
 
-        public const int MaxShipNum = 8;                // 最大舰船数量
-        public const int MaxCivilShipNum = 3;           // 最大民用舰船数量
-        public const int MaxWarShipNum = 4;             // 最大军用舰船数量
+        public const int MaxShipNum = 4;                // 最大舰船数量
+        public const int MaxCivilShipNum = 2;           // 最大民用舰船数量
+        public const int MaxWarShipNum = 2;             // 最大军用舰船数量
         public const int MaxFlagShipNum = 1;            // 最大旗舰数量
 
         public const int NumOfPosGridPerCell = 1000;    // 每格的【坐标单位】数