Complex sentence: Although nevertheless, China also bears a fair sum of pretelescopic observatories such as the Beijing Ancient Observatory ― a facility built during the 13th century and equipped with a wide array of revolutionary instruments, including an armillary sphere, a quadrant, a theodolite and a sextant.
Split into simpler sentences: Although nevertheless, China also bears a fair sum of pretelescopic observatories such as the Beijing Ancient Observatory ― a facility built during the 13th century and equipped with a wide array of revolutionary instruments. Some of which include: an armillary sphere, a quadrant, a theodolite and a sextant.