Complex sentence: While it was originally planned to be held in the Shanghai French Concession, police officers interrupted the meeting on 3 July and the congress was moved to a tourist boat on South Lake in Jiaxing, Zhejiang province.
Split into simpler sentences: While it was originally planned to be held in the Shanghai French Concession, police officers interrupted the meeting on 3 July. Because of that, the congress was moved to a tourist boat on South Lake in Jiaxing, Zhejiang province.