Tang Ruowang, a German, and Bai Jin, a Frenchman, are famous. They are also Christians. Emperor Kangxi had no antipathy to Christianity at first, and even had a favorable impression. Christians have a long history of missionary work in Asia. During the Warring States Period in Japan, Spanish and Dutch priests preached in Japan. At that time, they were called "Che Zhidan", which was a homonym of Christians. Later, Toyotomi Hideyoshi and Tokugawa Ieyasu banned Christianity because Christianity began to interfere in internal affairs.
At first, Emperor Kangxi also adopted an inclusive attitude and accepted the missionary work of Christian priests. Later, it was discovered that his prince used Christianity as a tool to fight for power and profit, and the Vatican also tried to interfere with China's traditional culture, ethics and politics many times.
At first, the Vatican allowed believers in China to worship Confucius at the same time. Later, the Vatican thought that worshipping Confucius at the same time was a betrayal of Christian principles and could not worship Confucius. Confucian culture is irreplaceable in China. It's impossible to be so ridiculous, and it's impossible for others to tell you about the majesty of Emperor Kangxi and how China people should govern the country.
Emperor Kangxi also consulted with foreign ministers such as Bai Jin many times. Although etiquette is different, it also shows great importance because of the interests of the dynasty. Although Emperor Kangxi banned Christian missionary work, skilled foreigners could still live in China, which also showed that Emperor Kangxi attached importance to science and technology and did not blindly govern. The reason is self-evident. Even now, it is the common sense of the international community not to interfere in the internal affairs of sovereign countries.