Although the topic of Notre Dame is not suitable for me, I want to say that even if there are 7 billion people on the earth and 6.99 billion people pity it, it is useless, otherwise we will not build them and let them invent the technology that balloons will not explode. We must find ways to make them talk and act. Um ... I just want to say ... This world view is wonderful, in short, balloons are so pitiful!