What does the information you have read suggest about the Chinese and Japanese attitudes about foreigners during the Isolation Period, and what implications might these attitudes have for the development of these two countries throughout history.
The Chinese and Japanese disliked any foreigners who entered into their country. They were not welcome, and if they did come, they had to respect china in all its power just like everyone else. Advances under the Ming and Qing Dynasty left China self-contained and uninterested in European contact.
China had become the dominant power in the region under the rule of the Ming Dynasty. The Chinese drove out their Mongol rulers and joined with Ming Dynasty, therefore keeping the peace with almost all of East Asia. Hongwu was one of the leaders of the rebel army who drove the Mongol leaders out of China and in the same year he became the first Ming Dynasty emperor. The first emperor of Ming used traditions that were well respected to bring stability to china. For example, he encouraged many to go back to Confucian morality standards and he improved the imperial administrative. He started reforms designed to restore the agriculture that had been lost during the war. Only the government was allowed to conduct foreign trade due to the fact that they had to keep the influence of outsiders to a low. The population of china exploded after the Spanish and Portuguese traders brought maize, sweet potatoes, and peanuts from the Central Americas. Due to such high power china had achieved, the vassal states from Korea to Southeast Asia paid their Ming overlords' regular tributes. China expected for the Europeans to do the same. The Ming Dynasty did not want to put up with outsiders or foreigners, and would not allow people from distant lands to threaten the peace and prosperity they had brought to china. China's rulers refused contact in fear that it would destabilize their society.