BEIJING (Reuters) - Peter Wang was asleep at his home in Beijing last Monday when police officers arrived before dawn to detain him, saying he had helped organize a protest planned for later that day. Across the city, others who had lost money investing in China’s online peer-to-peer (P2P) lending platforms - including some who had traveled from as far away as Shandong and Shanxi provinces - got similar visits from police. By the time they were released, the demonstration they had planned using social media chat groups had fizzled amid a massive security response around the China Banking and...