JLCPCB vs ALLPCB vs HQPCB vs PCBWay: Comparing Chinese PCB Prototyping Services

Some time ago, I have finished my first PCB design, so I need to find a PCB Fab. to produce my board. And I collect some information from the internet, following is my conclusion.1.JLCPCB, this is the cheapest one that I know, but it seems that if you need your board urgently, the surcharge is high.2.ALLPCB, they promise a shortest lead time for their customer, and a 5$ coupon is provided for the new customer.3.HQPCB, a professional one in the electronic field, but the price is not so friendly.4.PCBway, a mature company, they provide all-day customer service. 
If you have more advice, you can write in your comment.

Hi Ting-You can go to https://pcbshopper.com/ and enter your board specs to see a summary of what your PCB's will cost from a number of different suppliers.  This can save you a lot of time. 
I have used ALLPCB with good results and fast turn time. Last week Allpcb announce free shippng to the U.S and Canada if the package is under 1Kg.. This is a big advantage to those of us in the U.S. and Canada because the overseas shipping cost is often more than the cost of the PCB'sI have also had very good results with  https://www.pcbfabrication.com/ and https://www.seeedstudio.com/fusion_pcb.html-Rick

Nice to meet you, Ting. 
Like rick says, pcbshopper is a good choice. You can  find the cheapest pcb fab. 
Pcbway is good. Nice price and quality. and have a problem,  how to get $5 coupon on Allpcb?  Can you help me?    

Hello, rickThis week Allpcb announce free shipping to the global customer. Not only US and Canada. ))

http://www.allpcb.com/news_detail/38-Freeshippingactivitiesextendedtotheglobalcustomer.html

Thank you Rick.I get all the price information from  PCBshopper, but I think the price is not the only thing,  I need a reliable company to work with, although I'm just a beginner,  I believe I will have more works. So I need to gather more information , then, chose the most appropriate one. That's why I post my question here.

Sorry John,I don't know Allpcb has stopped 5$ coupon activity already. 

Truth be told, I never intended to order PCB's from China, because first, I wanted to buy American made parts wherever possible, and second, I was under the impression that I had to order hundreds or thousands of boards before it became practical to order overseas. The first time I ordered boards from China I thought I was ordering from a U.S. company, but it turned out to be a US-based sales office for a Chinese fabricator.  When the boards arrived I was very pleased with both the quality and the price. So now I was faced with a dilemma. I want to buy American-made boards, but I am also obligated to be a good steward of my company's resources. I ordered the next batch of boards from a well-known American source and there was a problem with shorted traces on the boards.  I called customer service expecting them to offer to re-make the boards, but instead they suggested that I use some steel wool to scrub off the whiskers between traces.  VERY surprising and disappointing.  Over time I ordered more boards from a different US supplier and from a couple Chinese suppliers. On one occasion I got a batch of boards from China with one of the holes undersize. I let them know that I was having to drill out the hole and wanted to make sure they corrected the error before the next batch, but they suggested that I toss the batch of boards and they would ship a replacement batch within 24 hours at no charge.  Nice!I do think the bad experience I had with the American company was the exception rather than the rule. I still order some PCB's from American sources now....but I also order a lot of boards from China too. -Rick

Yeah, I also find the boards made in China is cheaper than the American-made boards, so I focus on the Chinese companies.

I placed an order at Allpcb, it only cost me 5.49$, wow.

I typically use US suppliers for my small volume projects. The two that I use on a regular basis are oshpark.com and sunstone.com.Oshpark is very inexpensive, has a reasonable delivery time, and produces good quality boards. They can provide that by reducing flaxibility a bit. You can only get boards in purple solder mask, with an Enig finish, in two or four layers.Sunstone is  more oriented toward the professional application. I use them when I need more confidence in the controls, or a wider range of features and options. The assembly company I work for uses Sunstone almost exclusively.

I think no company can provide the price of 5.49$, hobbyist like me can have a try at Allpcb. But one thing, this price just appears in green solder mask, if you need other colors, the price will be higher.

i think no company can offer small batch from 5 pcs, but PCBGOGO they support it.
Delivery period is also good.
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We have created a list of PCB Fabrication and Assembly Companies in each country - You can select China in the country to narrow down the list and also select Prototype. Hope this helps:
PCB Fabrication Directory - https://www.pcbdirectory.com/manufacturersPCB Assembly Directory - https://www.pcbdirectory.com/assembly