Knowledge was valuable to the Christian missionaries who went to China in the nineteenth century. They wanted to spread the knowledge of Western Christianity and technology to the Chinese, but also they wished to exchange information among themselves about the work they were doing. The need to keep informed about the activities of their counterparts in other locations in the country was evident very soon after they arrived in China. Although the first Protestant missionary reached China in 1807, missionaries were not legally permitted to live in the interior of the country until after the signing of the 1860 treaties between China and Britain and France.