The earliest species of tree still surviving is the Maidenhair tree (Ginkgo biloba) of Zhexiang, ______, which first appeared about 165,000,000 years ago, during the Jurassic era:

The correct answer to the question: "The earliest species of tree still surviving is the Maidenhair tree (Ginkgo biloba) of Zhexiang, ______, which first appeared about 165,000,000 years ago, during the Jurassic era:" is "China ".