Help me to see which hall of the Forbidden City this is.

Jiaotai Hall is located in the north of Gan Qing Palace and the south of Kunning Palace. The name of the temple is taken from the Book of Changes, which means "Heaven and Earth meet and Kangtai is happy". It was built in the Jiajing period of the Ming Dynasty, rebuilt in the 12th year of Shunzhi (1655) and 8th year of Kangxi (1669), and rebuilt in the 2nd year of Jiaqing in 2007 (1797) when the Gan Qing Palace caught fire.

Jiaotai Hall is square in plane, with 3 rooms wide and 3 rooms deep. It has a single roof and a pyramid roof with four corners, a gold-plated copper roof, yellow glazed tiles, double crowns and five steps, beams decorated with dragons and phoenixes and painted seals. There are four sides, three intersecting six diamonds, four doors on the dragon and phoenix skirt, sill windows on the south side and walls on the other three sides. At the top of the hall is a pearl-holding algae well with gold bricks on the ground. There is a throne in the middle of the hall, on which is a plaque inscribed by Emperor Kangxi. Behind the throne is a board screen with the inscription of Jiaotai Hall inscribed by Emperor Qianlong. A copper pot is set in the east to drip water, which will not be used after years of dry growth. There is a bell on the west side of Jiaotai Hall, which was built in the third year of Jiaqing. The time in the palace is based on this. The chime clock is about 6 meters high and is the largest existing ancient clock in China.

Jiaotai Hall is the place where the Queen receives the Millennium Festival celebration ceremony, and it is also the place where the Queen receives the birthday celebration ceremony. In the Qing Dynasty, there were 25 precious seals in this temple, and each seal had a special purpose. In the first month of each year, the Qin dynasty chose an auspicious day to set up a case to open Chen Bao, where the emperor came to burn incense and salute. In view of the lesson of eunuch's autocracy in the Ming Dynasty, the Qing Sai-zu stipulated that eunuchs should not interfere in state affairs, and there was an iron sign in this hall that "Neigong should not interfere in political affairs". When the emperor got married, he set up a queen ceremony and a security hall. Every spring in Jiaotai Hall, silkworms are sacrificed first. On the first day, the Queen searched for mulberry equipment here. ~