What do expats find most challenging?

"Expats in Shanghai often find the language barrier to be one of the most challenging aspects of adjusting to the local culture. Additionally, the rapid pace of change within the city can make it difficult for expats to stay up to date on current local trends. Expats also often find that many cultural differences, such as expectations for appropriate attire or the focus on face and respect, can take some acclimation. Additionally, expats may struggle with the fact that many aspects of the city remain relatively inaccessible to foreigners," mentioned another expat when asked about moving to Shanghai, China, China.