Palestinian girl Sama Al-Sultan poses for a photo at a school in Gaza City, on May 19, 2021. Al-Sultan, 5 years old, who fled her home after it was damaged during Israeli air strikes, takes refuge at the school as many other Palestinians. (Photo: Xinhua)

Palestinian girl Lamis Al-Sultan poses for a photo at a school in Gaza City, on May 19, 2021. Al-Sultan, 7 years old, who fled her home after it was damaged during Israeli air strikes, takes refuge at the school as many other Palestinians. (Photo: Xinhua)

Palestinian girl Jaleya Al-Attar poses for a photo at a school in Gaza City, on May 19, 2021. She fled her home after it was damaged during Israeli air strikes, and took refuge at the school as many other Palestinians. (Photo: Xinhua)

Palestinian girl Basma Abu Rasas poses for a photo at a school in Gaza City, on May 19, 2021. Abu Rasas, 7 years old, who fled her home after it was damaged during Israeli air strikes, takes refuge at the school as many other Palestinians. (Photo: Xinhua)

Palestinian boy Mohammad Nasr, 7 years old, poses for a photo near a car which was hit by an Israeli air strike near his house in Gaza City, on May 19, 2021. (Photo: Xinhua)