Location advantage refers to the favorable conditions or superior status of an area in terms of economic development and scientific research. It is mainly determined by natural resources, labor, industrial agglomeration, geographical location, and transportation. It is a comprehensive concept. Which of the following are not location advantages? ['In the era of the knowledge economy, human factors dominate, and the mobility of people, especially those who master knowledge and skills, is very great. Cultivating and attracting high-tech personnel has become the key to regional economic development.', "Yunnan can be connected to the Pearl River Delta and Yangtze River Delta economic circles to the east; it can extend south to Hanoi, Bangkok, Singapore, and Yangon through the Pan-Asian Railway under construction; north to Sichuan and China's inland hinterland, etc.", 'Xichang Satellite Launch Center has low latitude, high altitude, and good launch inclination; the solid geological structure is conducive to the overall layout of the launch site; fine weather and good weather, and a good "launch window".', "Guangxi is located at the intersection of east, middle, and west of China's mainland. It is the junction of the South China Economic Circle, the Southwest Economic Circle and the ASEAN Economic Circle. It is the most convenient access to the sea in the southwest and even the northwest. Important passage."]