Here's a short story:

The BeiDou Navigation Satellite System (BDS, simplified Chinese: 北斗卫星导航系统; traditional Chinese: 北斗衛星導航系統; pinyin: Běidǒu wèixīng dǎoháng xìtǒng) is a Chinese satellite navigation system. It consists of two separate satellite constellations – a limited test system that has been operating since 2000, and a full-scale global navigation system that is currently under construction. 

The first BeiDou system, officially called the BeiDou Satellite Navigation Experimental System (simplified Chinese: 北斗卫星导航试验系统; traditional Chinese: 北斗衛星導航試驗系統; pinyin: Běidǒu wèixīng dǎoháng shìyàn xìtǒng) and also known as BeiDou-1, consists of three satellites and offers limited coverage and applications. It has been offering navigation services, mainly for customers in China and neighboring regions, since 2000. 

The second generation of the system, officially called the BeiDou Navigation Satellite System (BDS) and also known as COMPASS or BeiDou-2, will be a global satellite navigation system consisting of 35 satellites, and is under construction as of January 2015[update]. It became operational in China in December 2011, with 10 satellites in use, and began offering services to customers in the Asia-Pacific region in December 2012. It is planned to begin serving global customers upon its completion in 2020. (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: When will it begin to serve globally?
Guess: upon its completion in 2020

Question: What is the BDS?
Guess: a Chinese satellite navigation system.

Question: What is BDS an acronym for?
Guess: BeiDou Navigation Satellite System

Question: What's the name in traditional Chinese?
Guess: 北斗衛星導航系統

Question: What is the English translation of the Chinese characters?
Guess: The English transliteration is Běidǒu wèixīng dǎoháng xìtǒng

Question: How many constellations are there?
Guess: Two.

Question: When did the limited constellation start working?
Guess: 2000

Question: Is the full system working?
Guess: No.

Question: Why not?
Guess: It is under construction.

Question: Which one was first operational?
Guess: The BeiDou Satellite Navigation Experimental System

Question: How many satellites?
Guess: Three

Question: Did it have full coverage?
Guess: No.

Now answer the following question in the same format.

Question: Who were it's main clients?

customers in China and neighboring regions