diff --git a/common/bidutil/bidutil.go b/common/bidutil/bidutil.go
index 11ac39537e..20c42f1ccc 100644
--- a/common/bidutil/bidutil.go
+++ b/common/bidutil/bidutil.go
@@ -17,7 +17,7 @@ func BidBetterBefore(parentHeader *types.Header, blockPeriod uint64, delayLeftOv
 // BidMustBefore returns the time when the next bid must be received,
 // only considering the consensus delay but not bid simulation duration.
 func BidMustBefore(parentHeader *types.Header, blockPeriod uint64, delayLeftOver time.Duration) time.Time {
-	nextHeaderTime := time.UnixMilli(int64(parentHeader.TimeInMilliseconds() + blockPeriod))
+	nextHeaderTime := time.UnixMilli(int64(parentHeader.TimeWithMilliseconds() + blockPeriod))
 	nextHeaderTime = nextHeaderTime.Add(-delayLeftOver)
 	return nextHeaderTime
 }
diff --git a/consensus/parlia/parlia.go b/consensus/parlia/parlia.go
index 31ce7d792d..3c3d3b3c13 100644
--- a/consensus/parlia/parlia.go
+++ b/consensus/parlia/parlia.go
@@ -56,6 +56,7 @@ const (
 	checkpointInterval   = 1024         // Number of blocks after which to save the snapshot to the database
 	defaultEpochLength   = uint64(200)  // Default number of blocks of checkpoint to update validatorSet from contract
 	defaultBlockInterval = uint16(3000) // Default block interval in milliseconds
+	lorentzBlockInterval = uint16(800)  // Block interval starting from the Lorentz hard fork
 	defaultTurnLength    = uint8(1)     // Default consecutive number of blocks a validator receives priority for block production
 
 	extraVanity      = 32 // Fixed number of extra-data prefix bytes reserved for signer vanity
@@ -637,8 +638,18 @@ func (p *Parlia) verifyHeader(chain consensus.ChainHeaderReader, header *types.H
 			return fmt.Errorf("invalid parentBeaconRoot, have %#x, expected nil", header.ParentBeaconRoot)
 		}
 	} else {
-		if header.ParentBeaconRoot == nil || *header.ParentBeaconRoot != (common.Hash{}) {
-			return fmt.Errorf("invalid parentBeaconRoot, have %#x, expected zero hash", header.ParentBeaconRoot)
+		if header.ParentBeaconRoot == nil {
+			return fmt.Errorf("nil parentBeaconRoot after bohr hard fork")
+		}
+		lorentz := chain.Config().IsLorentz(header.Number, header.Time)
+		if !lorentz {
+			if *header.ParentBeaconRoot != (common.Hash{}) { // remove it once bsc mainnet passed lorentz hard fork for simplicity
+				return fmt.Errorf("invalid parentBeaconRoot, have %#x, expected zero hash", header.ParentBeaconRoot)
+			}
+		} else {
+			if header.Milliseconds() >= 1000 {
+				return fmt.Errorf("invalid parentBeaconRoot, have %#x, expected the last two bytes to represent milliseconds", header.ParentBeaconRoot)
+			}
 		}
 	}
 
@@ -776,6 +787,10 @@ func (p *Parlia) snapshot(chain consensus.ChainHeaderReader, number uint64, hash
 				// new snapshot
 				snap = newSnapshot(p.config, p.signatures, number, blockHash, validators, voteAddrs, p.ethAPI)
 
+				if p.chainConfig.IsLorentz(checkpoint.Number, checkpoint.Time) {
+					snap.BlockInterval = lorentzBlockInterval
+				}
+
 				// get turnLength from headers and use that for new turnLength
 				turnLength, err := parseTurnLength(checkpoint, p.chainConfig, p.config)
 				if err != nil {
@@ -1091,10 +1106,11 @@ func (p *Parlia) Prepare(chain consensus.ChainHeaderReader, header *types.Header
 	if parent == nil {
 		return consensus.ErrUnknownAncestor
 	}
-	header.Time = uint64(p.blockTimeForRamanujanFork(snap, header, parent).Seconds())
-	if header.Time < uint64(time.Now().Unix()) {
-		header.Time = uint64(time.Now().Unix())
+	blockTime := p.blockTimeForRamanujanFork(snap, header, parent)
+	if now := uint64(time.Now().UnixMilli()); blockTime < now {
+		blockTime = now
 	}
+	header.SetTime(blockTime, p.chainConfig.IsLorentz(header.Number, header.Time))
 
 	header.Extra = header.Extra[:extraVanity-nextForkHashSize]
 	nextForkHash := forkid.NextForkHash(p.chainConfig, p.genesisHash, chain.GenesisHeader().Time, number, header.Time)
diff --git a/consensus/parlia/ramanujanfork.go b/consensus/parlia/ramanujanfork.go
index 0dd6b4600a..4943e13832 100644
--- a/consensus/parlia/ramanujanfork.go
+++ b/consensus/parlia/ramanujanfork.go
@@ -26,17 +26,17 @@ func (p *Parlia) delayForRamanujanFork(snap *Snapshot, header *types.Header) tim
 	return delay
 }
 
-func (p *Parlia) blockTimeForRamanujanFork(snap *Snapshot, header, parent *types.Header) time.Duration {
-	blockTime := parent.TimeInMilliseconds() + uint64(snap.BlockInterval)
+func (p *Parlia) blockTimeForRamanujanFork(snap *Snapshot, header, parent *types.Header) uint64 {
+	blockTime := parent.TimeWithMilliseconds() + uint64(snap.BlockInterval)
 	if p.chainConfig.IsRamanujan(header.Number) {
 		blockTime = blockTime + p.backOffTime(snap, header, p.val)
 	}
-	return time.Duration(blockTime) * time.Millisecond
+	return blockTime
 }
 
 func (p *Parlia) blockTimeVerifyForRamanujanFork(snap *Snapshot, header, parent *types.Header) error {
 	if p.chainConfig.IsRamanujan(header.Number) {
-		if header.TimeInMilliseconds() < parent.TimeInMilliseconds()+uint64(snap.BlockInterval)+p.backOffTime(snap, header, header.Coinbase) {
+		if header.TimeWithMilliseconds() < parent.TimeWithMilliseconds()+uint64(snap.BlockInterval)+p.backOffTime(snap, header, header.Coinbase) {
 			return consensus.ErrFutureBlock
 		}
 	}
diff --git a/consensus/parlia/snapshot.go b/consensus/parlia/snapshot.go
index 19f2fbdeb0..ad865225e1 100644
--- a/consensus/parlia/snapshot.go
+++ b/consensus/parlia/snapshot.go
@@ -316,7 +316,7 @@ func (s *Snapshot) apply(headers []*types.Header, chain consensus.ChainHeaderRea
 		}
 		// It's better to set it based on IsOnLorentz, but in practice, the effect is the same as using IsLorentz.
 		if chainConfig.IsLorentz(header.Number, header.Time) {
-			s.BlockInterval = 800
+			s.BlockInterval = lorentzBlockInterval
 		}
 		snap.Recents[number] = validator
 		snap.RecentForkHashes[number] = hex.EncodeToString(header.Extra[extraVanity-nextForkHashSize : extraVanity])
diff --git a/core/chain_makers.go b/core/chain_makers.go
index 9e6ff779f1..7b470a5f05 100644
--- a/core/chain_makers.go
+++ b/core/chain_makers.go
@@ -614,7 +614,7 @@ func (cm *chainMaker) makeHeader(parent *types.Block, state *state.StateDB, engi
 			header.ParentBeaconRoot = new(common.Hash)
 		} else {
 			header.WithdrawalsHash = &types.EmptyWithdrawalsHash
-			if cm.config.IsBohr(header.Number, header.Time) {
+			if cm.config.IsBohr(header.Number, header.Time) && !cm.config.IsLorentz(header.Number, header.Time) {
 				header.ParentBeaconRoot = new(common.Hash)
 			}
 			if cm.config.IsPrague(header.Number, header.Time) {
diff --git a/core/genesis.go b/core/genesis.go
index 488e7fd421..880d058a8d 100644
--- a/core/genesis.go
+++ b/core/genesis.go
@@ -497,7 +497,7 @@ func (g *Genesis) toBlockWithRoot(root common.Hash) *types.Block {
 			// EIP-4788: The parentBeaconBlockRoot of the genesis block is always
 			// the zero hash. This is because the genesis block does not have a parent
 			// by definition.
-			if conf.Parlia == nil || conf.IsBohr(num, g.Timestamp) {
+			if conf.Parlia == nil || conf.IsBohr(num, g.Timestamp) && !conf.IsLorentz(num, g.Timestamp) {
 				head.ParentBeaconRoot = new(common.Hash)
 			}
 
diff --git a/core/types/block.go b/core/types/block.go
index dcbafe4337..1127f7bc72 100644
--- a/core/types/block.go
+++ b/core/types/block.go
@@ -30,6 +30,8 @@ import (
 
 	"golang.org/x/crypto/sha3"
 
+	"github.com/holiman/uint256"
+
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/rlp"
@@ -156,8 +158,23 @@ func (h *Header) Hash() common.Hash {
 	return rlpHash(h)
 }
 
-func (h *Header) TimeInMilliseconds() uint64 {
-	return h.Time * 1000
+func (h *Header) Milliseconds() uint64 {
+	if h.ParentBeaconRoot == nil || *h.ParentBeaconRoot == (common.Hash{}) {
+		return 0
+	}
+	return uint256.NewInt(0).SetBytes2(h.ParentBeaconRoot[30:]).Uint64()
+}
+
+func (h *Header) TimeWithMilliseconds() uint64 {
+	return h.Time*1000 + h.Milliseconds()
+}
+
+func (h *Header) SetTime(blockTime uint64, countMilliSeconds bool) {
+	h.Time = blockTime / 1000
+	if countMilliSeconds {
+		milliseconds := common.Hash(uint256.NewInt(blockTime % 1000).Bytes32())
+		h.ParentBeaconRoot = &milliseconds
+	}
 }
 
 var headerSize = common.StorageSize(reflect.TypeOf(Header{}).Size())
diff --git a/core/vote/vote_manager.go b/core/vote/vote_manager.go
index 5a48745b86..71d9e1e7a5 100644
--- a/core/vote/vote_manager.go
+++ b/core/vote/vote_manager.go
@@ -148,7 +148,7 @@ func (voteManager *VoteManager) loop() {
 			curHead := cHead.Header
 			parentHeader := voteManager.chain.GetHeaderByHash(curHead.ParentHash)
 			blockInterval, _ := voteManager.engine.BlockInterval(voteManager.chain, parentHeader)
-			nextBlockMinedTime := time.UnixMilli(int64((curHead.TimeInMilliseconds() + blockInterval)))
+			nextBlockMinedTime := time.UnixMilli(int64((curHead.TimeWithMilliseconds() + blockInterval)))
 			timeForBroadcast := 50 * time.Millisecond // enough to broadcast a vote
 			if time.Now().Add(timeForBroadcast).After(nextBlockMinedTime) {
 				log.Warn("too late to vote", "Head.Time(Second)", curHead.Time, "Now(Millisecond)", time.Now().UnixMilli())
diff --git a/miner/worker.go b/miner/worker.go
index b5fdc369bb..090560daa0 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -1032,7 +1032,7 @@ func (w *worker) prepareWork(genParams *generateParams, witness bool) (*environm
 			header.ParentBeaconRoot = genParams.beaconRoot
 		} else {
 			header.WithdrawalsHash = &types.EmptyWithdrawalsHash
-			if w.chainConfig.IsBohr(header.Number, header.Time) {
+			if w.chainConfig.IsBohr(header.Number, header.Time) && !w.chainConfig.IsLorentz(header.Number, header.Time) {
 				header.ParentBeaconRoot = new(common.Hash)
 			}
 			if w.chainConfig.IsPrague(header.Number, header.Time) {
diff --git a/params/config.go b/params/config.go
index 09b8c4fe24..aaaf004fb3 100644
--- a/params/config.go
+++ b/params/config.go
@@ -596,8 +596,7 @@ func (c CliqueConfig) String() string {
 
 // ParliaConfig is the consensus engine configs for proof-of-staked-authority based sealing.
 type ParliaConfig struct {
-	DeprecatedPeriod uint64 `json:"period"` // Number of milliseconds between blocks to enforce; deprecated, existed just for load old `ParliaConfig` from disk
-	Epoch            uint64 `json:"epoch"`  // Epoch length to update validatorSet
+	Epoch uint64 `json:"epoch"` // Epoch length to update validatorSet
 }
 
 // String implements the stringer interface, returning the consensus engine details.