How would the fate of Central Asia have changed if in 751 the Chinese defeated the Arabs in the battle on the Talas River?

The victory of the Tang troops in the battle on the Talas River, apparently, would lead to the domination of China over most of Central Asia, so that Buddhism, not Islam, would spread there.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.