Indian propagandists are now hitting back, by sharing videos of rain-related flooding or heatwaves in China.
It's going to have less impact that you think. Even the western propaganda machine, the most advanced and richest in the world, failed to get people to hate China, even after decades of trying. So what chance do you think you stand? And that too without state support?
China today is simply too loved and admired for your propaganda to have any effect on its reputation. Anti-China information warfare no longer works online. It's a fool's errand. Your time and efforts are better directed elsewhere.
In order to counter anti-India propaganda, here are two suggestions:
1) Keep reiterating positive news and stories about India. History and cultural heritage. Ancient inventions and discoveries. Historical monuments. Natural beauty. Scenic landscapes. Swanky airports. Fancy bridges. Tourists praising India. Double down on this again and again.
2) Retain the focus on Pakistan and the West, wherever you can. Keep spreading negative and embarrassing stories about them. There's enough material to work with. And you will find a receptive audience too.
The first rule of information war is the same as the first rule of physical war: Pick your battles carefully.