Afternoon. I am Li Dan.

下午好。我是李丹。

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Li Dan and Li Fang are twins. They look the same.

李丹和李芳是双胞胎，她们看起来很像。

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Objective: To study the effect of Su Gan li Dan therapy for cholelithiasis with Danshiqing tablet (DT).

目的：通过临床和实验研究，观察胆石清片治疗胆石症的作用。

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Li Dan, a young idealist, has devoted his life to helping those with HIV-AIDS in China.

NPR: One Man Against AIDS in China