I am looking for any information on Lockerbies who stayed in Shanghai.

My grandfather Arthur Lockerbie travelled to Shanghai where he met up with his brother Charles Duncan Lockerbie.

My Grandmother Jane/Jean travelled out later to marry him in the Holy Trinity Church, Shanghai on the 27/12/1924 when they stayed at 442 Rue Breniers de Montmorand.

Their first child Angus Lockerbie was born on 27/3/1927 at the Victoria Nursing Home, Shanghai and they were now all staying at 70 Avenue de Roi Albert, Shanghai.

We believe that Charles Duncan Lockerbie married Catherine Baptista in Shanghai and that he was an engineer and that Arthur was a marine engineer and PERHAPS worked for P and O but supposedly worked on ships out of China

Anybody have any ideas as to how to move forward my research into there time in Shanghai