wǒ xiǎng zài guìtái bǔbàn yínhángkǎ.

In this sentence, 想 means would like to / want to.

So 我想在柜台补办银行卡 means something like I’d like to reissue my bank card at the counter.

想 can also mean to think, but that is usually clear from context:

• 我想去银行。 = I want / would like to go to the bank.
• 我想这个办法可以。 = I think this method works.

Here, because 想 is followed by an action (在柜台补办银行卡), it is understood as want to / would like to.

Here, 在 means at / in / on, and it introduces the location where the action happens.

• 在柜台 = at the counter
• 在银行 = at the bank
• 在家 = at home

So in this sentence:

• 在柜台补办银行卡 = reissue the bank card at the counter

It is functioning like a location phrase placed before the verb.

Chinese usually puts time, place, and other background information before the main verb.

A very common pattern is:

subject + modal/attitude word + place + verb + object

So here:

• 我 = subject
• 想 = would like to
• 在柜台 = place
• 补办 = reissue / replace
• 银行卡 = bank card

That gives:

我 + 想 + 在柜台 + 补办 + 银行卡

In English, we often put the place later:
I’d like to reissue my bank card at the counter.

In Chinese, putting 在柜台 before the verb is very natural.

补办 means to apply for a replacement / reissue something that was lost, damaged, or needs to be redone.

It is commonly used for documents, cards, and similar official items, such as:

• 补办身份证 = replace/reissue an ID card
• 补办银行卡 = replace/reissue a bank card
• 补办手续 = complete or redo formalities/procedures

So 补办 is more specific than just do or handle. It suggests that something already existed before and now needs to be replaced or processed again.

Because 银行 means bank, while 银行卡 means bank card.

• 银行 = bank
• 卡 = card
• 银行卡 = bank card

So if you said 补办银行, that would not make sense. The thing being reissued is the card, not the bank itself.

This is a very common question because 行 has multiple pronunciations.

In 银行, it is pronounced háng.
So:

• 银行 = yínháng

The character 行 can also be pronounced xíng in other words, where it often means okay / capable / to do, for example:

• 可以，不行。 = Okay / not okay
• 行，我知道了。 = Alright, I got it.

So you simply have to learn the pronunciation as part of the word:

• 银行 = yínháng
• 银行卡 = yínhángkǎ

Not necessarily.

我想在柜台补办银行卡 is natural and understandable. In many contexts, Chinese can talk about an object in a general sense without a number or measure word.

If you want to be more explicit, you can say:

• 我想在柜台补办一张银行卡。

That means I’d like to reissue a bank card.

Both are fine, but the version without 一张 is often more natural in practical service situations when the object is obvious.

Yes, it is polite enough in many everyday situations. 我想... sounds fairly soft and natural, similar to I’d like to...

If you want to sound a little more polite or formal, you could say:

• 我想在柜台补办银行卡，可以吗？
  I’d like to reissue my bank card at the counter. Is that okay?

• 您好，我想补办银行卡。
  Hello, I’d like to reissue my bank card.

• 麻烦您，我想补办银行卡。
  Excuse me / Sorry to trouble you, I’d like to reissue my bank card.

So the original sentence is fine, but adding 您好 or 麻烦您 can make it sound more courteous.

You can, but the meaning changes slightly.

• 在柜台补办银行卡 = reissue the bank card at the counter
• 去柜台补办银行卡 = go to the counter to reissue the bank card

So:

• 在 focuses on the location of the action
• 去 focuses on the movement toward that location

If you are already at the bank and just stating what you want to do there, 在柜台 is very natural.
If you are talking about where you need to go, 去柜台 also works.

Sometimes yes, but it depends on context.

If you are speaking directly to bank staff, Chinese often omits the subject when it is obvious. So you might hear:

• 想在柜台补办银行卡。

However, for learners, including 我 is safer and clearer:

• 我想在柜台补办银行卡。

That sounds complete and natural.

Yes, 柜台 usually means counter, especially in places like:

• banks
• hotels
• stores
• service desks

In a bank, 柜台 refers to the staffed service counter where you speak to an employee.

So 在柜台补办银行卡 means you want to handle the replacement at the staffed counter, not at an ATM or on a mobile app.

柜台 is pronounced guìtái.

Tone by tone:

• 柜 guì = 4th tone
• 台 tái = 2nd tone

So it sounds like:

• guì: sharp falling tone
• tái: rising tone

If you practice the whole phrase:

• 在柜台 = zài guìtái

A common learner issue is making both syllables flat. Try to keep the tones clear:

• zài = 4th tone
• guì = 4th tone
• tái = 2nd tone

A useful way to understand it is:

我 / 想 / 在柜台 / 补办 / 银行卡

Which follows this pattern:

subject + modal verb + location + main verb + object

So:

• 我 = I
• 想 = would like to
• 在柜台 = at the counter
• 补办 = reissue / replace
• 银行卡 = bank card

This is a very common Chinese sentence structure. Once you know it, you can make similar sentences:

• 我想在银行开户。
  I’d like to open an account at the bank.

• 我想在前台办理入住。
  I’d like to check in at the front desk.

• 我想在窗口买票。
  I’d like to buy a ticket at the window.