How can I get from the headquarters of Chongqing Medical University to Baiyan Tianxian Valley, Sheng Da Town, Yubei District, without driving by myself?

It's more convenient to take a bus. You can buy a ticket for Zhang Hongqi Hegou from Yuanjiagang Light Rail Station, that is, take the Light Rail Line 2 first, and then transfer to Line 3 at Niujiaotuo. Hongqi Hegou Light Rail Station, 1 Exit. Next to the exit is the bus stop from Jiangbei Hongqi Hegou North Bus Station to Tongjing. It takes about an hour from North Bus Station to Tongjing. Get off at the T-junction of Tongjing Qi Jing Road, and there is a round-the-city bus to Sheng Da or Baiyan. If the cherry blossom festival opens at that time, there should be a bus around the city to the venue.