1. The grade standards of dried longan are:

1. Special grade: diameter is more than 27 mm.

2. Level 1: diameter between 24 and 26.9 mm.

3. Level 2: diameter between 21 and 23.9 mm.

4. Level 3: diameter less than 21 mm.

2. How to choose dried longan:

1. Take a look: the shell of good dried longan is thin and crisp, smooth, plump and not shriveled, not damaged or collapsed, and has a bright color. Yellowish brown, larger in size. After peeling off the shell, the flesh inside is brown.

2. Shake: Pick up the dried longan and shake it. If there is no sound or shaking inside, it means the pulp is relatively full.

Extended information:

Main varieties of longan:

1. Wulongling:

Also known as Wushiling and Xialuling, it comes from Jiaowei Town, Xianyou, Fujian. It is the origin of Putian and Xianyou, Fujian. Mainly grown varieties. The peel is yellow-brown, the flesh is soft and crisp, slag, slightly juicey, difficult to separate from the core, high sugar content, medium edible rate, large fruit, average single fruit weight 12 to 13.5 grams. Because of its thick skin, large fruit, large core, and rich and sweet taste, it is an excellent variety for roasting and is also suitable for eating fresh.

2. Chuliang:

It comes from Chuliang Village, Bianjie Town, Gaozhou City, Guangdong. It is one of the most cultivated varieties in Guangdong, Guangxi and Hainan. The peel is dark yellow-brown, slightly green, with high sugar content. The flesh is thick, crisp, slag-free, free from the core, and does not leak juice. It tastes sweet and has high edible rate. The fruit is large, with an average fruit weight of 12 grams. Small, slightly later-ripening than Shikia, it is a high-quality fresh and dried variety.

3. Dawuyuan:

It is also known as big longan, trachoma, and lychee longan, all referring to its large fruit characteristics. Distributed in major production areas in Guangxi and some production areas in Guangdong Province. The average weight of a single fruit is 18.3 grams, with the heaviest being 31 grams; the peel is dark yellow-brown, the flesh is thick, crispy, crumbly, and easy to separate from the core. It has high edible rate, medium sugar content, light and sweet taste, and medium fresh food quality. It is eaten fresh and is an excellent variety for making canned longan, dried longan and longan meat. ?

4. Shuguan:

It is cultivated in large areas in Sichuan, Yibin and Chongqing. It is an excellent local variety. The fruit is larger, with an average fruit weight of 12.4 grams; the peel is yellow-brown, thick; the flesh is crispy, slag-free, core-free, slightly juicey, juicy, sweet, slightly fragrant, and has a medium edible rate. It is of high quality and is suitable for eating fresh, drying and canning. ?

Baidu Encyclopedia-Dried longan