You can take the 248 bus first, then the 226 bus, and then the 14 bus.
It's about 10 meter walk to Huaguoyuan Station, bus No.248 takes 4 stops to Qianling Mountain Park Station (bus No.33 and bus No.53 can also be taken), and it's about 290 meters walk to Qianling Mountain Park Station. After 18 stop, take bus No.226 to Gaozhitang Station, and walk about 10 meter to Han Zhichang intersection (welcome station).