In the late Qing Dynasty, the closed Qing government began to set up the "Tongwen Pavilion" to hire foreigners to teach foreign languages such as English. Its main purpose was to be as little deceived as possible when signing unequal treaties with the powers. However, this is strictly limited to the technical level Language practice, but it has suddenly entered the fields of science and technology, culture, thought, and ideology, which eventually led to China's "big change in the millennium. " Language exchange often brings unexpected gains, which makes people have more expectations. What is the inaccurate understanding of this passage? ['Innocent intentions, unexpected results.', 'Bad things sometimes turn into good things.', 'Language-communication can promote social progress.', 'Mastering a foreign language is like opening a window.']