Idiom:

Rome was not built in one day ( do something with patience )

Hit the book：
Rivalry
Competitor
Red-letter day
Utilize
Acrimonious
Terse
Cosmopolitan
Test the waters
Physical shop
The rivalry

Singles' Day is not just about Alibaba. Main competitor JD.com is attempting to muscle aggressively into Alibaba's red-letter day, utilising its backing by internet giant Tencent to market to customers through popular social media apps WeChat and QQ.