I worked in the design centre, not finance, and was in a less developed province, so while this made many things slightly more relaxed much of what is related by Zara Zhang rings true.

“Work”, as we know it, is basically a struggle to reply to WeChat messages. On any given day, I probably receive several hundred WeChat messages (this is not counting large WeChat groups) for work. Business plans, legal documents, and due diligence files are sent over WeChat. It is very common for professionals to have tens of thousands of unread messages on WeChat. Consider it your email inbox, except that every sentence within an email is broken down into separate messages, so the number of unread messages multiplies. Since WeChat messages come at all times and many require immediate response, people are constantly interrupted and distracted during meetings.
What is it like to work in China? via Jan Chipchase