May I know where can I find a souvernier or small gift like keychain, fridge magnet etc. in Jinan?

You can find many kinds of souvenirs nearby popular scenic areas. Or you can go to Furong (Lotus) Pedestrian Street. Many shops there sell all kinds of interesting souvenirs. You can go and see.

Noted with many thanks.

I got 2 days, which are hotel can recommend and what top 5 must do?

You are suggested to stay at C.Sohoh Business Hotel. It has good living environment and warm service. The price is about CNY 300 per night. It's near to Furong Pedestrian Street. The address is No.53 Liyuan Avenue. Hope you like.
In addition, this city has several scenic areas. You are suggested to go to Baotu Spring Park, Heihu Spring, Daming Lake Park, Thousand-Buddha Mountain and Shandong Provincial Museum. Have a nice trip!