Nepal's embassy in China handles single certificate.

It takes four working days for the embassy or consulate to go through the certification formalities, and each piece costs 30 Canadian dollars. If urgent treatment is needed, the person who picks up the goods within 24 hours must pay an extra urgent fee of 50 Canadian dollars; Picking up the goods within 48 hours will pay an extra $35 for each item.

Anyone who applies for document authentication must provide a copy of the party's identity document (such as passport).

These are Canadian references in China. You didn't say which country's Yongxin wealth immigrants enthusiastically told you.