Bro its totallu your wish and will verify yourself before encouraging people to pay them. You might be interacting with their PUNTERS here is little knowledge improvment for you.

World Heritage : M.D Amitav Ray from Kolkatta

Rare Earth : 1. Rare Earth Magnets : M.D. Subramanium from Chennai

2. Rare Earth Metals : M.D. Gopi from Kerela

Decen World : M.D Roy again a Kolatta based.

I dont want you to leave this site but dont fall in wrong hands dear. There are few materials in anf aroound your native work on that yourself also you can check with this all you named in those proposals defenetly they wont be performing.