In January 2019, scientists in China said they had made five identical cloned gene-edited monkeys using somatic cell nuclear transfer, like with Zhong Zhong and Hua Hua. They also used a gene-editing Crispr-Cas9 technique that He Jiankui said was used to create the first gene-modified human babies Lulu and Nana. These monkey clones were made to study several medical diseases.