2、Sun Ge et al. discovered for the first time the Cretaceous Cenomanian angiosperm Platanus and my country’s earliest aquatic angiosperm Nelumbo fossils, and advanced the fossil record of  Nelumbo in China by more than 30 million years, greatly improving the research level of  Mesozoic plant classification in China.

　　　　　　　　　　　　　　　　　　　Platanus heilongjiangensis and Zircon U-Pb dating

　　　　　　　　　　　　　　　　　　　　　　　　　　　　Nelumbo jiayinensis