What potential geoengineering technologies could help a country "achieve its Paris (agreement) targets"?
I think the third paragraph of the article hints at what might be the thinking.

In the next five years, the total area covered by artificial rain or snowfall will reach 5.5 million sq km, while over 580,000 sq km (224,000 sq miles) will be covered by hail suppression technologies. The statement added that the program will help with disaster relief, agricultural production, emergency responses to forest and grassland fires, and dealing with unusually high temperatures or droughts.

Firstly, rain will absorb some CO2 by creating small amounts of carbonic acid (H2CO3). Agricultural production would remove some CO2. Reduction of CO2 production via the possible prevention of grass &amp; forest fires. This would also be aided by the supposed reduction of temperatures and droughts. With sufficient rain to ensure the Three Gorges Dam is always full, potentially consistently reliable hydroelectricity could be achieved, thus reducing the amount of CO2 producing energy sources used for energy production.
Finally, hail suppression technologies were mentioned. By eliminating hail one eliminates the potential for damaging hail to occur thus reducing the need to manufacture building products to repair buildings damaged by hail. It also prevents crop damage by hail thus eliminating the need to plant replacement crops.