Renewal L Visa in Shanghai

Hi,
I and my daughter are British nationals living in Shanghai on L Visa's that are valid for 2 years with multiple entries with max 180 days per visit , my wife is Chinese National.
The Visas run out this summer, can we apply for renewal here in Shanghai, or do we need to return to UK (originaly issued in London) to apply, or even Hong kong? We are looking for same one as we have now (2year ,multiple entry 180 days) as daughter is at school here and any shorter period for visa is a pain.
Looking forward to your advise

John