Here is the full list of all 24 Kai Yuan achievements.
Enter the first chapter
Complete the "A new broom" chapter
Complete the "Iron and the Army" chapter
Complete the "The land of abundance" chapter
Complete the "The northern border" chapter
Complete the "Desert outpost" chapter
Complete the "Alluvial plain" chapter
Complete the "A new provincial capital" chapter
Complete the "Gap in Helan Mountain" chapter
Complete the "Luoyang, the eastern capital" chapter
Complete the "Yangguan ancient road" chapter
Complete the "Flourishment Age of Kaiyuan Era" chapter
Train an elite swordsman troop
Train a team of elite pikemen
Train an elite archery force
Train an elite cavalry
Train a team of elite catapults
Need to protect Chang'an in the An-Shi Rebellion
In the chapter of "The land of abundance", the annual grain output reaches 10000
In the chapter of "Desert outpost", the annual trade export reached 12000, and there was no debt in the process of urban construction
In the chapter of "A new provincial capital", the urban population reaches 6000
In the chapter of "Gap in Helan Mountain", the city's annual profit reached 15000
In the chapter of "Yangguan Ancient Road", victory was achieved before 700 A.D
Before 741 AD, the capital of Chang'an treasury needed to reach 100000. 420 people in the city lived in luxury residences and had never been in debt during the construction of the city