What to do after Vietnam visa approval letter?

Hi there. I am going to Vietnam by air in this December for almost 2 months. It means that I can apply for a visa online. What I want to know here is: what I need to do after receiving the approval letter? Do I need to send it to the embassy for further acts? Please advise.

Dear Dacas,

Please be informed that with Vietnam visa on arrival, you have no work to do with the embassy as the visa on arrival and visa issued by the embassy has nothing linked to each other.

To obtain the visa approval letter, you only need to go online at https://booking.vietnam-visa.com/step1.html, complete the form, and then pay for service fee.

After receiving your information, we will work with the Vietnam Immigration Department to process the visa approval letter for you and send it to your email upon its issuance. Together with the letter, we also send your detailed guide to pick up full visa at Vietnam airport.

After receiving the letter, you only need to print it and the attached entry and exit form out, fill out the form, prepare 2 passport-sized photos and stamping fee (US $25 for a 3-month single entry visa). And when you arrive at your departure airport, you need to show your original passport and the letter to the airlines to get on board, and then show all the above things at the landing visa counter upon arrival at Vietnam airport to get visa stamped there.

This whole procedure is illustrated as in this picture:

We hope this information is clear to you.

Should you need any further information, please feel free to let us know.

Kind regards,

Vietnamvisa.sg