Photo taken on March 1, 2020 shows Saladin Citadel in Cairo, Egypt. Egypt lit up on Sunday evening three famous historical sites in the country, including Saladin Citadel in Cairo, in red and golden stars to resemble the national flag of China as a sign of solidarity in combating the novel coronavirus. The other two sites are the main pylon of the Karnak Temple Complex in Luxor and the entrance of the Philae Temple Complex in Aswan. (Xinhua/Wu Huiwo)