Now that you have received the short message confirming the interview, you can send the email confirming the interview as soon as possible. As long as you attend the national examination interview on time, you will not be disqualified. If you don't confirm the interview or attend the interview on time, you will be disqualified. So, you need to confirm the interview now. If you are not at ease, you can call the recruiting unit to see if you will be disqualified.
For more information about the national examination interview, please refer to: Sichuan Zhonggong Education-National Civil Service Examination Network.
If in doubt, please consult the public education enterprises in China.