Bảo vật này được bảo quản cẩn thận.

In Vietnamese, demonstratives usually come after the noun.

• bảo vật này = this treasure / this artifact
• cuốn sách này = this book
• ngôi nhà này = this house

So the word order is different from English:

• English: this treasure
• Vietnamese: treasure this → bảo vật này

In this sentence, được marks a passive meaning.

• Bảo vật này được bảo quản cẩn thận. = This treasure is carefully preserved.

A very common pattern is:

• được + verb

This often means to be [done] in a passive sense, especially when the result is neutral or positive.

Examples:

• Ngôi nhà được xây năm 1990. = The house was built in 1990.
• Cô ấy được khen. = She was praised.

In your sentence, được bảo quản means is preserved / is being kept.

No, not always.

Vietnamese often allows passive meaning to be understood from context, so sometimes được can be omitted. But including được makes the passive reading clearer and more natural in many formal sentences.

Compare:

• Bảo vật này được bảo quản cẩn thận.

  • clearly passive
  • This treasure is carefully preserved

• Bảo vật này bảo quản cẩn thận.

  • much less natural in this form
  • may sound incomplete or awkward to many speakers

So in this sentence, được is the normal and natural choice.

Bảo quản means to preserve, keep, store, or maintain carefully so something does not get damaged.

It is commonly used for:

• artifacts
• documents
• food
• medicine
• equipment

Examples:

• bảo quản thực phẩm = preserve/store food
• bảo quản tài liệu = preserve documents
• bảo quản hiện vật = preserve artifacts

In your sentence, it suggests careful preservation of something valuable, not just casually “keeping” it somewhere.

They are part of two different words:

• bảo vật = treasure, precious object, artifact
• bảo quản = to preserve, to maintain carefully

Even though both start with bảo, you should learn them as separate vocabulary items.

For a learner, the easiest approach is:

• memorize bảo vật as one unit
• memorize bảo quản as one unit

The repetition is normal and does not sound strange to Vietnamese speakers.

Here, cẩn thận functions like an adverb, meaning carefully.

So:

• bảo quản cẩn thận = preserve carefully

Vietnamese does not need a special -ly ending like English. Words that are adjectives in one context can often work adverbially in another context.

Compare:

• Anh ấy rất cẩn thận. = He is very careful.
  → adjective-like use
• Anh ấy làm việc cẩn thận. = He works carefully.
  → adverb-like use

So in your sentence, cẩn thận describes how the treasure is preserved.

In Vietnamese, words describing the manner of an action often come after the verb.

So:

• bảo quản cẩn thận = preserve carefully
• nói chậm = speak slowly
• làm tốt = do well

This is very normal Vietnamese word order.

Not exactly.

• bảo vật usually means a precious object, treasured artifact, or valuable relic
• kho báu means treasure hoard or treasure collection

So:

• bảo vật này = this treasure / this precious artifact
• kho báu này = this treasure trove / this treasure cache

If the sentence is about one important historical object, bảo vật is the better word.

It sounds fairly formal or at least careful, written Vietnamese.

Why?

• bảo vật is a literary/formal word
• bảo quản is also more formal than a casual everyday verb

This kind of sentence would fit well in:

• museums
• historical descriptions
• news reports
• educational materials

In casual speech, people might choose simpler wording depending on context.

Yes.

Vietnamese verbs do not change form the way English verbs do, so without a time marker, the sentence can often be interpreted from context.

• được bảo quản cẩn thận can mean:
  • is carefully preserved
  • is being carefully preserved
  • sometimes even has been carefully preserved, depending on context

If you want to make the time clearer, Vietnamese can add markers such as:

• đang = ongoing action
• đã = completed/past
• sẽ = future

Examples:

• Bảo vật này đang được bảo quản cẩn thận. = This treasure is being carefully preserved.
• Bảo vật này đã được bảo quản cẩn thận. = This treasure has been / was carefully preserved.

Normally, you would use được, not bị, here.

Very generally:

• được is used for neutral or positive passive situations
• bị is used for negative or unwanted passive situations

Examples:

• Cô ấy được mời. = She was invited.
• Cô ấy bị phạt. = She was punished.

Since being carefully preserved is a good or at least neutral thing, được bảo quản is the natural choice.

Using bị bảo quản would sound strange, because it would imply preservation is somehow an unpleasant thing happening to the treasure.

Sometimes, but not always.

Bảo vật by itself means treasure, precious object, or valuable artifact. It does not automatically mean national treasure.

If Vietnamese specifically wants to say national treasure, it would usually say:

• bảo vật quốc gia

So:

• bảo vật này = this treasure / this precious artifact
• bảo vật quốc gia này = this national treasure

An active version would mention the person or institution doing the preserving.

For example:

• Bảo tàng bảo quản bảo vật này cẩn thận. = The museum preserves this treasure carefully.

So the relationship is:

• Passive: Bảo vật này được bảo quản cẩn thận. = This treasure is carefully preserved.

• Active: [Someone] bảo quản bảo vật này cẩn thận. = [Someone] preserves this treasure carefully.

This is a useful way to understand what the passive sentence is doing.