Yeah, I wasn't clear. They talk about "excess savings", which, as far as I understand, are additional savings relative to baseline, so total amount of money saved should be much higher.

I came from China. I can provide some context for people to understand what $660 mean in China:

1. It's about 2 month's salary for low to low-medium level, in most big cities.

3. Rent for one room, about 120 square foot is about $100 per month, in big cities.

2. It costs 2 to 3 us dollars for one-person's meal, with 4 to 5 dollars you can get a good meal. Tax included.