El remitente chino usa correo certificado.

Remitente means sender: the person or company sending the letter or package.

Destinatario means recipient / addressee: the person who receives it.

So in postal language:

• remitente = sender
• destinatario = recipient

El is the masculine singular definite article, meaning the.

So el remitente = the sender.

Spanish usually needs an article where English sometimes does too, and sometimes even where English would leave it out. Here, it is simply identifying a specific sender.

In Spanish, adjectives usually come after the noun.

So:

• remitente chino = Chinese sender

That is the normal word order:

• noun: remitente
• adjective: chino

Putting chino before the noun would sound unusual here and would not be the normal neutral order.

By itself, chino normally describes the sender as Chinese.

So el remitente chino most naturally means:

• the sender is Chinese, or
• the sender is associated with China in some way

In real-life context, people may understand it as the Chinese sender or the sender from China, depending on the situation. If you wanted to be more explicit, you could say:

• el remitente de China = the sender from China
• el remitente chino = the Chinese sender

Because remitente here is treated as masculine with el, so the adjective also appears in the masculine singular form:

• el remitente chino

If the sender were feminine, you would say:

• la remitente china

The adjective must agree in gender and number with the noun.

Yes. Usa is the third-person singular present tense of usar.

• yo uso = I use
• tú usas = you use
• él / ella / usted usa = he / she / you use

So El remitente chino usa correo certificado means The Chinese sender uses certified mail.

Because usar often takes a direct object without an article when speaking generally about what is being used.

So:

• usa correo certificado = uses certified mail

This is similar to speaking about a service or type of mail in a general sense.

If you added the article, usa el correo certificado, it could sound more like uses the certified mail service or refer to it in a more specific way. The version without the article is very natural.

Correo certificado is the postal service where mailing is officially recorded and can usually be tracked or confirmed.

In English, it is often translated as:

• certified mail
• sometimes registered mail, depending on the country and postal system

The exact postal term can vary a little by country, but the basic idea is a more secure, documented form of mail.

In some contexts, usar can mean to wear, especially with clothing, accessories, or hairstyles:

• usa lentes = he/she wears glasses
• usa sombrero = he/she wears a hat

But with correo certificado, it clearly means uses, because mail is a service or method, not something you wear.

Normally, no. In Spanish, nationalities and nationality adjectives are usually written in lowercase.

So:

• chino
• mexicano
• argentina
• estadounidense

That is why the sentence uses chino, not Chino.

Yes, but the original order is the most neutral:

• El remitente chino usa correo certificado.

You could also say:

• El remitente chino certificado usa correo — this changes the meaning and sounds odd, so not good here
• Usa correo certificado el remitente chino — possible, but marked and less neutral

For learners, the safest and most natural version is the original:

• subject + verb + object

You would make the noun, article, adjective, and verb agree in the plural:

• Los remitentes chinos usan correo certificado.

Breakdown:

• el → los
• remitente → remitentes
• chino → chinos
• usa → usan

Correo certificado stays singular here because it refers to the type of mail/service being used.