The forecasted data for the length of non-roaming outgoing calls in China shows a steady upward trend from 2024 through 2028, starting at 249.54 billion minutes and growing to 254.5 billion minutes. Assuming the actual value in 2023 was slightly below 249.54 billion minutes, this trend indicates modest annual increases.

Year-on-year growth is expected to be very incremental, with each subsequent year showcasing a slight increase compared to the previous year. The compound annual growth rate (CAGR) over the forecasted period reflects a small but consistent upward movement, indicative of a mature and stable market.

**Future Trends to Watch For:**

Advancements in mobile communication technologies and their possible impact on the duration of calls.
Possible shifts towards data-driven communications impacting traditional voice call durations.
Continuous evolution of consumer behavior and increasing influence of digital platforms.