Beijing has held a grand gathering to mark the 105th founding anniversary of the Communist Party of China. Xi Jinping, General Secretary of the CPC Central Committee, delivered a key speech reviewing the Party's 105-year journey, from its founding mission of seeking happiness for the Chinese people and rejuvenation for the nation, to its current task of advancing Chinese modernization. What are the key messages out of today's speech? How has the CPC continued to adapt through different stages of China's development? And as China enters a new stage of modernization, what are the Party's major opportunities and challenges ahead?