Why has China set its growth target for 2025 at around 5%?

China has set its GDP growth target for this year at around 5 percent. Premier Li Qiang announced the target in his government work report at the annual session of the National People’s Congress. Other top government priorities include boosting consumer demand and improving investment, as well as promoting tech innovations and modernizing industry. What are the main focal points of this year's Two Sessions meetings? Why has China set its economic target for 2025 at around 5%? And how will the country address its internal and external challenges to achieve that goal?