Seems China is still hit randomly with Pneumonic Plague, which is simply a form of Bubonic Plague but targeted in different areas of the body.
Bubonic is an infection in the lymphatic system, pneumonic is respiratory, and septicemic through the blood stream. (simple trivia)
Those that support the hypothesis that the two plagues are separate argue that they have separate symptoms, claiming that the bubonic plague causes the bubo glands(in your armpits, neck, and groin area to swell forming buboes, while the black death can also cause necrosis of the fingertips and toes.
Read more: http://wiki.answers.com/Q/What_is_the_difference_between_the_Black_Death_the_plague_and_the_bubonic_plague#ixzz25iksGAbF
So there is a large argument going on whether they're the same. It seems the general idea that the Black Death and Bubonic Plague are the same thing whether buboes are present or not, though I didn't put a whole lot of effort into researching it honestly, I had a general idea for a paper in HS.