It should be Zibo accent. Tian Tian Lao Zhang is from Zibo.

Zibo is located in the east of China and the middle of Shandong Province, at the important intersection of the Yellow River Delta Efficient Ecological Economic Zone, Shandong Peninsula Blue Economic Zone and the economic circle of the provincial capital city group, with Linyi in the south, Dongying and Binzhou in the north, Weifang in the east and Jinan in the west.