Can stocks be bought and sold at any time during trading hours? There must be buyers and sellers, right?

If the day before Christmas (65438+February 24th), the day before New Year's Day (65438+February 3rd1) and the day before Lunar New Year (December 30th) are working days, then the above days in the Hong Kong market are half-day quotes: trading in the morning is half-day, and that day is not the settlement date of the Hong Kong Stock Connect. Then, on the L+2 day, the half-day market (L day) and the trading day before the half-day market (L- 1 day) will be settled. For example, 65438+February 22nd and 65438+February 23rd are trading days of Hong Kong Stock Connect, 65438+February 24th is a half-day market of Hong Kong Stock Connect, and 65438+February 25th to 65438+February 28th are holidays during Christmas. 65438+February 29th will be completed: 65438+February 22nd transaction funds, 65438+February 23rd and 65438+February 24th combined expenses and corporate behavior funds; 65438+February 30th will be completed: 65438+February 23rd, 65438+February 24th, transaction fund settlement, 65438+February 29th, corporate behavior fund settlement.