Hey, i hope someone can help me.

1. I wish to buy some jewelleries and beads by importing it from china, so may i know whether i will be taxed? and what is the percentage of duty tax for it?
2. What is EMS?
3. Do u guys know any import agents that can help us to get from the custom is our items are taxed? and how much would be their charges? what are the services they provide?

Thanks for ur help