Which episode is the fairy couple turning the stone into gold?

Episode 33. Qiaozui Zhang retaliated against the seven fairies with the golden hairpin, but the seven fairies didn't guard against their sneak attack. Fortunately, the small stone saved the day. Qiaozui Zhang, wearing a golden hairpin, used magic to change money at will in the capital, causing chaos in the whole city. The seven fairies cast spells to change back. Qiaozui Zhang cast another spell, and the whole city was enveloped in poison. The seven fairies could do nothing but turn to their father, the Jade Emperor. Liu Daxia fought bravely against Qiaozui Zhang and was assassinated.