Well if you read the ELUA for the game it says:
3.2.3. No malicious or deceiving use
● modify server code (including the use of cheats, hacks, etc.);
● exploit flaws in Game mechanics (exploits, bugs, etc.);
● use software that automates the game process (bots, mods), changes gameplay or functionality of the Game, grants an advantage over other players not using such software, or otherwise changes game experience, whether yours or any other player’s;
● use any third-party software which may anyhow interfere with the Game which is not authorized by Gaijin for a particular Game(s) or related services, unless such use is permitted by law as a mandatory rule;
● destroy, disable (or assist in destroying, disabling) any computer or server used to support the Game and related services; to upload any files that contain malicious code, including viruses, spyware, trojans, worms, intentionally corrupted data, or any other files that may damage, or interfere with, the Games and related services; organize, assist or take part in any type of cyberattacks, including, without limitation, denial of service, and commit any other actions or attempts to disrupt the Games and related services;
● use the Game, knowingly or unintentionally, in violation of any applicable law or regulation, or contribute to a violation of any applicable law or regulation;
● make available, offer, advertise, promote, and otherwise distribute any of the aforementioned means of malicious or deceiving use.
If you have not done any of above then you in no way violated the ELUA. As a matter of fact nothing in section 3 in the ELUA would have anything to do with that, so unless its somehow different in China which I highly doubt as their is very much no rule against attacking bases in the game period with rockets otherwise you may as well have one for bombs which would be utter BS nobody would not know about if that were the case. If they were using scripts then yes that would be a violation of 3.2.3 if they " use software that automates the game process (bots, mods), changes gameplay or functionality of the Game, grants an advantage over other players not using such software, or otherwise changes game experience, whether yours or any other player’s"
Here is a link to the currently ELUA which is part of the TOS with both the English and Chinese links
https://legal.gaijin.net/termsofservice (EN)
https://legal.gaijin.net/termsofservice (CN)