Why you should have plastic injection mold and molding in China

Components and labor are cheaper  This is absolutely true. Components can be a fraction of the price, tooling for injection molds is significantly less expensive, and labor for manning the assembly line is easily replaced, making it very affordable.
China has been the place where everything has been made for decades. They’ve gotten really good at it. Their supply lines for plastics,transportation logistics, those are all pretty well nailed down. They’re better at making injection molds than other countries.
Tying all your resources up in product can be guaranteed if your product is manufactured right. Managing experience is the most important part and the hidden costs of manufacturing can be completely big savings.  Manufacturers can help reduce a lot of the risk for a startup, and offer experience and expertise,thus saving money and producing a higher quality product in a short period of time.
Because they’ve nailed down their supply lines, and everybody works 10 hour days 6 days a week, and everybody knows somebody, things can happen very fast. Prototyping can take place quickly, so as your quality requirement and satisfaction.
Internet speeds are fast, phone calls are easy to understand.

Yet, some overseas clients look only price and insufficient communication/presentation with suppliers will cause problems. Therefore, it is important with good quality (technical and communication) suppliers rather than target only on the lowest and then bargain for even lower price.  
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We also experienced some molds sent from Australian clients who did in US for maintenance. Workmanship was sometimes found to be poor with flashes, unbalance filling, no cad data documents and un-reliable tool design of weak steel,  inconsistence dims for multi-impressions tools,etc. Of course, some are good. Therefore, selection of correct supplier is the most important and is not always say good in one country or bad in the other countries. Advisable to see its testimonials for firstly consideration.   
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