Guangdong
Tea houses and restaurants in Guangzhou usually have afternoon tea at about 2 o'clock or 2: 31 and finish before dinner.
Hong Kong
Most restaurants in Hong Kong call it "tea time" from 2: 31 pm to 5: 31 pm. Most fast food restaurants, western restaurants and tea restaurants will provide meals with smaller portions and cheaper prices than lunch [1]. Most restaurants in Hong Kong will offer special discounts during this period, and snacks or noodles served in tea time are generally cheaper than lunch and dinner.
There will be a tea time called "3: 31" (3: 15 pm) in the construction industry, decoration industry and some office buildings in Hong Kong, but it is only a customary rest time, and it is not a daily meal.
Britain
English people drink afternoon tea in a rich and frugal way, from a noble formal tea party to an afternoon tea where they can eat only snacks instead of tea, which can be called afternoon tea.
Nowadays, English afternoon tea is usually held from 3: 31 to 4: 31 in the afternoon.