HarmonyOS SM4加密后如何转成正常的string

// 加密消息
async function encryptMessagePromise(symKey: cryptoFramework.SymKey, plainText: cryptoFramework.DataBlob) {
  let cipher = cryptoFramework.createCipher('SM4_128|ECB|NoPadding');
  await cipher.init(cryptoFramework.CryptoMode.ENCRYPT_MODE, symKey, null);
  let encryptData = await cipher.doFinal(plainText);
  console.log(`加密成功`)
  return encryptData;
}

这里针对加密密文转成string：Uint8ArrayToHex(encryptText.data)，后台解不出，显示乱码