Twin boys Peng Zhihan and Peng Jiahan are in second grade, are not only brothers, but good friends. Once the younger brother Peng Jiahan left to live with their grandmother for a week. The brothers spoke on the phone every day. "I missed him so much when I could not see him all day. Only speaking to him, can I feel happy. I want to be with him every day," Peng Zhihan said. [Photo/VCG]