Deploy xong nhớ MINT sẽ có token ERC 721

// SPDX-License-Identifier: MIT
// Compatible with OpenZeppelin Contracts ^5.0.0
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";

contract lehieukemNFT is ERC721 {
    uint256 public tokenId;

    constructor() ERC721("lehieukemCollection", "LKEM") {
        tokenId = 0;
    }

    function mint() public {
        _mint(msg.sender, tokenId);
        tokenId++;
    }
}