March to June. According to the query of China Energy Construction Network, the National Energy Administration issued the Letter on Defining Gansu as a Power Transmission Province outside Zhejiang, officially confirming that the second UHV DC project in Hexi, Gansu Province is located in Zhejiang, and it has been included in the National Tenth Five-Year Plan simultaneously. The average construction period of UHV is 2 years, and the approval is expected to start from March to June, so the approval time of UHV DC in Gansu and Zhejiang is expected to be March to June.