Based on the provided data for re-import of supported catalysts to China, there's a forecasted increase in volume from 1.3357 million kilograms in 2024 to 1.6281 million kilograms in 2028. The year-on-year growth demonstrates a consistent upwards trend, suggesting strong demand and supply chain dynamics improving steadily over these years. Unfortunately, the variations over the last two years can't be calculated without actual 2023 values. The compound annual growth rate (CAGR) over the forecasted period is about 5.05%, indicating moderate growth.

Future trends to watch for include:

Technological advancements that could boost production efficiency.
Changes in global and domestic environmental regulations affecting catalyst demand.
Potential shifts in economic conditions impacting the industrial usage of these catalysts.