Corporate ethics refers to the maintenance of social public opinion, traditional habits, and inner convictions in this particular socio-economic organization of an enterprise. Moral principles based on the evaluation of good and evil, the sum of moral norms and moral activities, and The differences can be divided into corporate ethics and employee professional ethics. Based on the above definitions, which of the following is corporate ethics? ['Enterprise managers strive to strengthen their professional quality and improve staff efficiency through learning.', "For a contract, an enterprise stipulates in a clause that fully complies with the legal procedures of the country, requiring the other company to donate 1.25 million yuan to establish a children's hospital.", "When marketers sell products and services to foreign markets, marketers need to understand the behavior and rules of the host country's culture.", 'In commodity marketing negotiations in Europe and the Arab countries, managers have a lot of authority, so negotiations are often conducted at a higher level.']