Answer:The Hijri Year
Explanation:That event took place in 622 AD and marks the start of the annual count. According to the Islamic calendar, 2019 in the Gregorian calendar is the year 1440
You’re wrong he did discover China he wasn’t trying to keep Spain away he was actually keeping it further
Ming dynasty was considered to be an oldest kingdom of China which had influenced East Asia in the sphere of trade.
The Government of Ming had comprehensive laws which were elaborate for the people to follow and they were heavily backed up by a strong military base.
China was an ally of Europe and accrued much wealth by selling, silk, porcelain and Glass. Japan and Korean peninsula was east of China and agriculture is practiced which paved way for the rise of oldest civilizations.