Challenges Faced by Mainland Chinese English Language Learners (Q&A)

I answer a question for a reader.

Question:

“My name's Aaron… I myself have an online language learning company (www.diallekt.com), and I was hoping to get your thoughts on a couple questions…

What are the biggest difficulties/challenges that Chinese English learners face?
What's their main motivation for learning English? i.e. to be competitive, get a better job, to become fluent, etc.”