Er Ya’s proofreading is good.
1. Comments. Erya's collation has notes and explanations, and the content is easy to understand, but Erya's annotations do not, so Erya's collation is better.
2. Price. The price of Erya's proofs and notes is 120 yuan, and the price of Erya's annotations is 160 yuan. Erya's proofs and notes are good.