Don't judge SDL's ticket prices by Western, Japan, or even Hong Kong standards.
A
July 19, 2013 New York Times article is telling:
Average annual income for a family in 2012 was 13,000 renminbi, or about $2,100. When broken down by geography, the survey results showed that the average amount in Shanghai, a huge coastal city, was just over 29,000 renminbi, or $4,700, while the average in Gansu Province, far from the coast in northwest China, was 11,400 renminbi, or just under $2,000. Average family income in urban areas was about $2,600, while it was $1,600 in rural areas.
Assuming the survey is accurate and a very healthy 10% annual income gain since then, that makes the ¥370 standard day ticket equivalent to a
$488 one-day Magic Kingdom ticket and the ¥499 peak day ticket equivalent to a
$658 one-day Magic Kingdom ticket.