diff --git a/contracts/BEChip.sol b/contracts/BEChip.sol
index 02c36a1..d05d85e 100644
--- a/contracts/BEChip.sol
+++ b/contracts/BEChip.sol
@@ -2,6 +2,8 @@
 pragma solidity 0.8.10;
 import "./BEBase.sol";
 
+// this contract will transfer ownership to BETimelockController after deployed
+// all onlyowner method would add timelock
 contract BEChip is BEBase{
     constructor() ERC721("Crypto Elite's Chip", "CECP") {}
 }
diff --git a/contracts/BEEquipment.sol b/contracts/BEEquipment.sol
index ef8f128..5c66c2b 100644
--- a/contracts/BEEquipment.sol
+++ b/contracts/BEEquipment.sol
@@ -2,6 +2,8 @@
 pragma solidity 0.8.10;
 import "./BEBase.sol";
 
+// this contract will transfer ownership to BETimelockController after deployed
+// all onlyowner method would add timelock
 contract BEEquipment is BEBase{
     constructor() ERC721("Crypto Elite's Equipment", "CEE") {}
 }
diff --git a/contracts/BEHero.sol b/contracts/BEHero.sol
index 3add215..60d83e2 100644
--- a/contracts/BEHero.sol
+++ b/contracts/BEHero.sol
@@ -2,6 +2,8 @@
 pragma solidity 0.8.10;
 import "./BEBase.sol";
 
+// this contract will transfer ownership to BETimelockController after deployed
+// all onlyowner method would add timelock
 contract BEHero is BEBase{
     constructor() ERC721("Crypto Elite's Hero", "CEH") {}
 }
\ No newline at end of file
diff --git a/contracts/EvolveProxy.sol b/contracts/EvolveProxy.sol
index b121f5a..7fa6fa3 100644
--- a/contracts/EvolveProxy.sol
+++ b/contracts/EvolveProxy.sol
@@ -5,6 +5,9 @@ import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
 import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
 import "./HasSignature.sol";
 
+// this contract will transfer ownership to BETimelockController after deployed
+// all onlyowner method would add timelock
+
 interface IBurnableERC721 is IERC721 {
     function burn(address owner, uint256 tokenId) external;
 }
diff --git a/contracts/MarketPlace.sol b/contracts/MarketPlace.sol
index 0265ad8..29927dc 100644
--- a/contracts/MarketPlace.sol
+++ b/contracts/MarketPlace.sol
@@ -10,6 +10,8 @@ import "@openzeppelin/contracts/access/Ownable.sol";
 import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
 import "./HasSignature.sol";
 
+// this contract will transfer ownership to BETimelockController after deployed
+// all onlyowner method would add timelock
 contract MarketPlace is Ownable, HasSignature {
     using SafeERC20 for IERC20;
     using SafeMath for uint256;