San Diego (/ˌsæn diˈeɪɡoʊ/ SAN dee-AY-goh, Spanish: [san ˈdjeɣo]; Spanish for 'Saint Didacus') is a city on the Pacific Ocean coast of Southern California located immediately adjacent to the Mexico–United States border. With a 2020 population of 1,386,932, it is the eighth most populous city in the United States and the seat of San Diego County, the fifth most populous county in the United States, with 3,338,330 estimated residents as of 2019. The city is known for its mild year-round climate, natural deep-water harbor, extensive beaches and parks, long association with the United States Navy, and recent emergence as a healthcare and biotechnology development center. San Diego is the second largest city in the state of California, after Los Angeles.
Tengzhou, a county-level city under the jurisdiction of Shandong Province, is hosted by Zaozhuang City. It is adjacent to Shanting District in the east, Xuecheng District in the south, Weishan County in Jining City in the west, and Zoucheng City in the north. It is between 116o 49km east longitude 117o 24km east longitude, 34o 50km north latitude and 35 °17' north latitude, with a total area of 1495 square kilometers. Tengzhou, in ancient times, is the land of the three Kingdoms and Wuyi and the state of prosperous culture. The archaeological excavation of the site of "Beixin Culture" dating back 7300 years shows that it is one of the birthplaces of the earliest civilization of the Chinese nation. Tengzhou is the hometown of Mozi, the founder of craftsmen, Xi Zhong, Meng Changjun and Mao Sui. In addition, during the Zhenguan period, Li Yuanying, the younger brother of Tang Taizong Li Shimin, was once named King Teng in Tengzhou, Shandong Province, and built a pavilion named "Teng" in Tengzhou.