Modify the wrong sentences, explain the reasons for the mistakes and correct them.

1. Missing subject ~ ~ can be supplemented with related words.

2. The second half of the sentence wrongly modifies the object. It modifies the first half of the sentence, not the jade bead.

So you can add some demonstrative pronouns, such as:

The ancient jade Buddha beads presented to the country by a farmer have high arts and crafts value.

A farmer presented an ancient jade Buddha bead to the country, which has high arts and crafts value.