# In bưu gửi

<mark style="color:blue;">`GET`</mark> `https://bill.ems.com.vn/prints/{tracking_code}`

{% hint style="info" %}
Api in bưu gửi tùy chọn theo các mẫu A5, A6, B1, E4.
{% endhint %}

#### Parameters:

<table><thead><tr><th width="205.28571428571428">Tên trường</th><th width="150">Kiểu dữ liệu</th><th>Chú thích</th><th data-type="checkbox">Bắt buộc</th></tr></thead><tbody><tr><td>merchant_token</td><td>String</td><td>Token</td><td>true</td></tr><tr><td>tracking_code</td><td>String</td><td>Mã EMS, có thể nhiều mã cùng lúc. VD: EAxxxxVN, EBxxxxVN.</td><td>true</td></tr><tr><td>paper-size</td><td>String</td><td>EMS cung cấp 4 mẫu in cho khách: Mặc định mẫu A5 paper-size=E4 paper-size=A6 paper-size=B1</td><td>false</td></tr></tbody></table>

```
Ví dụ: 
https://bill.ems.com.vn/prints/EMxxxxxxxVN,EMxxxxxxVN?merchant_token=xxxxxxxxxxx&paper-size=E4.
```

#### Responses:

{% tabs %}
{% tab title="Kiểu thường - Size A5" %}

#### Mẫu mặc định.

![](/files/qzJ31Ke9YF1NDTwzN7an)
{% endtab %}

{% tab title="Kiểu nhãn - size 8x12.5" %}
paper-size=E4

![](/files/DrYK7Jomfa9GCdtLgHFZ)
{% endtab %}

{% tab title="Kiểu B1 - size 10x6.5" %}
paper-size=B1

![](/files/LV5r6d2cog5awfk9ZX5h)
{% endtab %}

{% tab title="Kiểu A6" %}
paper-size=A6

![](/files/hnReQ20YS1CGzgPyJyNc)
{% endtab %}
{% endtabs %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docws.ems.com.vn/tieng-viet/buu-gui/in-buu-gui.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.