Jelly powder is the gelatine powder with spices, which can be used to make jelly directly, while gelatine powder needs to be added with juice or other drinks to make jelly. Usually, nowadays, gelatine powder and jelly powder are mixed into the same thing, so you need to read the instructions clearly when you buy it.
Bean jelly, in South China, refers to the jelly made of bean jelly grass and rice, which turns into green or black after freezing, and can be used as thirst-quenching products in summer, such as Guangdong bean jelly and Jiangxi bean jelly.