Why does Shandong CPPCC Law Firm always use the network number to make phone calls?

Shandong Zheng Xie Law Firm was established on April 9, 2020, with a registered capital of 300,000 yuan, legal representative Xie Jigong and registered address of 0 108, No.20, Shandong Road, Shinan District, Qingdao.