On a recent Saturday at Beijing's Peking Union Medical College Hospital, where some of the country's best doctors and specialists practice, most of the weaknesses of China's ruined health care system are on full display. Some 20-odd men and women from across the country huddle on straw mats, waiting for care. They won't get it on a Saturday. The hospital isn't open on the weekends except for a short period on Sunday morning. So the patients wait.