Why do millions of Chinese care about a fictitious meth cook from New Mexico? The television drama series Breaking Bad, which depicts embattled high school chemistry teacher Walter White's transformation into a crystal methamphetamine kingpin and airs its final episode on Sunday, has unquestionably become a cultural phenomenon in the United States (viewership reached 6.6 million for the series' penultimate episode last week). But it has also attracted a relatively large audience in China, where it's known as jueming dushi -- "The doomed drug ma