If you add the words "the most" and "the highest end" in front of it, it is forbidden. The Advertising Law of People's Republic of China (PRC) explicitly prohibits the use of such terms as "national level", "superlative level" and "best" in advertisements.
Source: Item (3) of Article 9 of People's Republic of China (PRC) Advertising Law (1994 10), adopted at the 10th meeting of the Standing Committee of the 8th NPC on October 27th, 2006, and revised at the 14th meeting of the Standing Committee of the 12th NPC on April 24th, 2006;
Article 9 An advertisement shall not be under any of the following circumstances: (3) Use such terms as "national level", "highest level" and "best".
Extended data
Article 17 of the Advertising Law of People's Republic of China (PRC): Except advertisements for medical treatment, drugs and medical devices, it is forbidden to use any other advertisements involving the function of disease treatment, and it is not allowed to use medical terms or terms that easily confuse the promoted goods with drugs and medical devices.
Eighteenth health food advertisements shall not contain the following contents:
1, indicating the assertion or guarantee of efficacy and safety;
2, involving disease prevention and treatment functions;
3. claiming or implying that the advertised goods are necessary to protect health;
4. Compare drugs with other health foods;
6. Other contents prohibited by laws and administrative regulations.
China People's Congress Network-People's Republic of China (PRC) Advertising Law