Hardness of the Sun

Exploration Stage: Sun Pavilion
From: Yui
Description: We’ll definitely find out who broke the sundial, but now the most important thing is to fix it! The clock’s core is a phoenix stone - a relic of the Sun, which was presented to Wan Nian by a heavenly patron. Please help me find all the fragments of the broken stone!
Completed: It’s great that you found all the pieces of the phoenix stone! I’ll try to glue them together. Wan Nian watched the Sun for a year, studying the change of time of day. Appreciating his intelligence and interest in the heavenly body, the bird of the Sun - the phoenix - presented this precious stone to Wan Nian.