"Sincerity" has a very important position in Chinese Confucian philosophy. It is both the category of heaven and humanity. From the aspect of heaven and truth, "sincerity" is the universe's body, attributes and functions, and it is the life and power of the universe. Mencius said: "The one who is sincere and unmoved is the one who has not; the one who is not sincere is the one who has not been able to move. " From a humanitarian perspective, "sincerity" is the criterion of moral life and the supreme value goal. Xunzi pointed out: "Husband Sincerity, the gentleman's guard is also the essence of politics. "Confucianism has raised" sincerity "to the height of politics, and its political ethics has a world-warning role in modern times. "Sincerity" has sincerity, sincerity, Licheng and sincerity. Which of the following performance belongs to "sincerity"? ['Grand Duke is selfless and affectionate.', 'Perseverance and continuous improvement.', "Don't count on interests, don't go around.", 'Keep your promises and talk.']