When I traveled by tube everyday in London, I found that many people like to hold a book in their hands. I think it is different and not bad. In Beijing, people prefer to playing smart digital devices than everything. While a very important reason is there is no signal under London. When I asked the travelers will they give up books, most of them said no~but…
Whatever,the people in London are limited by no-signal, the people in Beijing are limited by signal.