How many solar terms were there during the Warring States Period?

Which Warring States period? Japanese Warring States Period or China Spring and Autumn Warring States Period?

If it refers to the Warring States Period in Japan, it will be twenty-four, because many things of the Japanese basically copied from China, including the calendar.

If it refers to the Spring and Autumn Period and the Warring States Period, it is not necessarily so. The calendars implemented in different countries are not uniform, but at the end of the Warring States period, a calendar system was basically formed. Sima Qian's Historical Records-Almanac recorded the calendar and related solar terms in detail.