Answer the following question: Read the following article and select the best answer. Article: CHINA established the city of Sansha yesterday on Yongxing Island in the southernmost province of Hainan. A ceremony to mark the city's establishment began at 10:40 am on a square in front of the city government's main building. The national flag was hoisted and the national anthem played after the unveiling of the signboards of the Sansha Municipal Government and the Sansha Municipal Committee of the Communist Party of China(CPC). Official broadcaster China Central Television(CCTV) aired the ceremony live, with speeches from Sansha's newly appointed mayor and other officials. Sun Shaochi, vice minister of civil affairs, announced the State Council's approval of the establishment of the city at the ceremony. Luo Baoming, Party chief of Hainan Province, said in a keynote speech that Sansha was established to administer the Xisha, Zhongsha and Nansha islands and their surrounding waters in the South China Sea. "The provincial government will be devoted to turning the city into an important base to safeguard China's sovereignty and serve marine resource development." he said. He said the main task now will be to build up political power in Sansha to ensure efficient management. The Sansha city government is located on Yongxing Island, a part of the Xisha Islands and the largest island in the area. Sansha is 13 hours from the mainland by boat. It has a post office, bank, supermarket and hospital, but little else. Question: The writer's purpose of writing this passage is to_. - introduce the Sansha city - attract people to travel here - announce the news that Sansha city was established - tell the importance of the city
Answer:
announce the news that Sansha city was established