Bro instead of demographic dividend it had become an economic bane on their resources that is the MAIN REASON for their irrelevancy, nobody want to take human import from India as they plan to export themselves out of poverty.
This is a topic that is rarely mentioned, and apparently it was one of the big issues why India didn't join RCEP, because the other countries didn't want an explosion of Indian workers in their country (see Singapore). I don't think China asks for these conditions when signing any bilateral or multilateral agreements. China is mostly interested in visa free travel reciprocity agreements, not work/immigration visas agreements.You are right that they are exporting their people, that is why they always stress easier work visa application for Indians, when signing trade treaty with other countries.
This issue gives me more insight into Xi's famous offhand remark "中国一不输出革命,二不输出饥饿和贫困,三不去折腾你们"