Short answers, pulled from the story.
King Zheng of Qin unified China in 221 BCE after conquering six rival states. This ruler enacted legalist reforms that standardized Chinese characters, measurements, road widths, and currency across the empire.
The Han dynasty created a cultural identity among its populace still remembered today as the ethnonym of modern Han Chinese. The Han dynasty emerged to rule between 206 BCE and 220 CE following the collapse of the Qin dynasty.
CCP Chairman Mao Zedong formally proclaimed the People's Republic of China in Tiananmen Square on the 1st of October 1949. By 1949, the CCP took control of most mainland China while the ROC government retreated offshore to Taiwan.
China's GDP grew from $150 billion in 1978 to $18.74 trillion by 2024 according to the World Bank. Between 1978 and 2018, China reduced extreme poverty by 800 million people.
Baiji was confirmed extinct on the 12th of December 2006 due to human activity such as habitat destruction, pollution, and poaching for food or traditional Chinese medicine.