diff --git a/server/jccommon/types.go b/server/jccommon/types.go
index b304a45d..7ecee479 100644
--- a/server/jccommon/types.go
+++ b/server/jccommon/types.go
@@ -108,6 +108,13 @@ type UserStackingPo struct {
 	Contracts []*ContractStackingPo `json:"contracts"`
 }
 
+type ContractStackingCecPo struct {
+	NetId int32 `json:"net_id"`
+	ContractAddress string `json:"contract_address"`
+	TokenType int32 `json:"token_type"`
+	Nfts []*NftStackingPo `json:"nfts"`
+}
+
 type NftIdentity struct {
 	NetId int32
 	ContractAddress string
@@ -141,6 +148,11 @@ func NewContractStackingPo() *ContractStackingPo {
 	return p
 }
 
+func NewContractStackingCecPo() *ContractStackingCecPo {
+	p := new(ContractStackingCecPo)
+	return p
+}
+
 func NewUserStackingPo() *UserStackingPo {
 	p := new(UserStackingPo)
 	p.Contracts = []*ContractStackingPo{}
diff --git a/server/light_backtask/task/stacking_go.go b/server/light_backtask/task/stacking_go.go
new file mode 100644
index 00000000..c6ddde1d
--- /dev/null
+++ b/server/light_backtask/task/stacking_go.go
@@ -0,0 +1,88 @@
+package task
+
+import (
+	"q5"
+	"f5"
+	"main/mt"
+	"main/service"
+	"jccommon"
+	"time"
+)
+
+type stackingCec struct {
+	lockMetas []*mt.Contract
+}
+
+type accountStackingCec struct {
+	accountAddress string
+}
+
+func (this* stackingCec) init() {
+	this.lockMetas = []*mt.Contract{}
+	mt.Table.Contract.Traverse(func (ele *mt.Contract) bool {
+		if ele.GetName() == jccommon.CONTRACT_NAME_NFTLock {
+			q5.AppendSlice(&this.lockMetas, ele)
+			f5.GetSysLog().Info("task.contribution.init load lockMetas net_id:%d name:%s contract_address:%s",
+				ele.GetNetId(),
+				ele.GetName(),
+				ele.GetAddress())
+		}
+		return true
+	})
+	if len(this.lockMetas) <= 0 {
+		panic("task.contribution.init lockMetas is empty")
+		return
+	}
+	go this.calc()
+}
+
+func (this* stackingCec) unInit() {
+}
+
+func (this* stackingCec) stat(statTime int64, nowTime int64) {
+}
+
+func (this* stackingCec) calc() {
+	for true {
+		nowTime := f5.GetApp().GetRealSeconds()
+		this.stat(nowTime - 3600 * 24, nowTime)
+
+		nowTime = f5.GetApp().GetRealSeconds()
+		daySeconds := q5.GetDaySeconds(nowTime, 0)
+		sleepTime := daySeconds + 3600 * 24 - nowTime + 3
+		time.Sleep(time.Second * time.Duration(sleepTime))
+	}
+}
+
+func (this* stackingCec) isStatEd(statDaySeconds int64) (error, bool) {
+	return nil, false
+}
+
+func (this* stackingCec) loadFromDb(addressHash *q5.ConcurrentMap[string, *accountStackingCec],
+	ds *f5.DataSet) bool {
+	accountAddress := ds.GetByName("last_lock_address")
+	if accountAddress == "" {
+		return true
+	}
+	ownerAddress := ds.GetByName("owner_address")
+	p := new(jccommon.NftStacking)
+	p.NetId = q5.ToInt32(ds.GetByName("net_id"))
+	p.ContractAddress = ds.GetByName("contract_address")
+	p.TokenType = q5.ToInt32(ds.GetByName("token_type"))
+	p.TokenId = ds.GetByName("token_id")
+	p.ItemId = q5.ToInt32(ds.GetByName("item_id"))
+	p.Quality = q5.ToInt32(ds.GetByName("quality"))
+	lockMeta := mt.Table.Contract.GetByNetIdName(p.NetId, jccommon.CONTRACT_NAME_NFTLock)
+	if lockMeta == nil {
+		return true
+	}
+	if lockMeta.GetAddress() != ownerAddress {
+		return true
+	}
+	return true
+}
+
+func (this* stackingCec) saveToDb() {
+
+}
+,