The Lin Yin Tianxia Villa project in Lanzhou was approved by the relevant departments of Lanzhou City and obtained the legal construction permit. According to the announcement issued by Lanzhou Planning and Construction Administration, the project meets the requirements of Lanzhou planning and construction, and has passed the relevant environmental assessment and land use approval procedures. In addition, the developer of Lin Yin Tianxia Villa is also a real estate development company with good reputation and legal business qualifications. Therefore, it can be confirmed that Lin Yin Tianxia Villa is legal.