Song Zhong vs Bai Ye

Dan Cong is organised around individual named old trees, and these are the two stocks a buyer meets most. Song Zhong carries a large premium and a traditional claim of Song-dynasty descent; Bai Ye is the most planted lineage and therefore the most available.

cultivar

What is being compared

Point by point

AspectSong ZhongBai Ye
What it refers toOld-bush stock on Phoenix Mountain from which most Dan Cong aroma types descend.The stock behind Ya Shi Xiang, named for its pale leaf rather than any white-tea connection.
Age claim‘Song’ refers to claimed descent from Song-dynasty plantings; what is verifiable is that the surviving trees are old, individually named and propagated from.No comparable claim attached.
AvailabilityLimited, and widely imitated.The most planted Dan Cong lineage outside the old bushes, which is why Ya Shi Xiang is the most available aroma type.
PriceA large premium.Modest.
What separates them in quality termsScarcity and lineage.Availability rather than quality — a distinction worth making to anyone told Ya Shi Xiang is the lesser tea.
What a buyer can verifyVery little. Age claims about individual bushes are not verifiable by a buyer.More, because the tea is common enough to compare against itself.

The short answer

Ya Shi Xiang is cheap because there is a lot of it, not because it is the lesser tea. Song Zhong is expensive because there is very little and the claims attached cannot be checked, which is a poor basis for a first purchase.

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