Mianyang Museum is just one of the attractions in Youxian District, Mianyang so you might want to stop by during your trip. If you want to experience more of the culture Mianyang has to offer, head to China Academy of Engineering Physics, Science City, and Mianyang People's Park.
Seeing the sights doesn't have to break the bank. For some things to do in Nanba, try a visit to attractions such as Shuhan Jiangyou Gate during your trip. Be certain to include a visit to Wanglang Nature Reserve.