<prompt> Translate the following text to EnglishKatika miaka saba niliyopitia katika uongozi wa China, kama sijapata kujifunza kitu kingine, nimejifunza kwamba kila kesi inatoa changamoto mpya.  <response>: In my almost seven years at the helm of the PRC, if I have learned nothing else, Ive learned that each case presents a new challenge. 