Not sure why the image not show

{{gwi:120885}}

Here is a link that might be useful: image of my tree

Looks a little like sunburn. Did the tree go from full shade to full sun after you planted it?

Agreed, sunburn. It had probably been in a greenhouse or shade cloth house. It should grow new leaves and those will be use to the sun.

I don't know anything about Longan, but I have had similar issues when transplanting blueberry shrubs in sunny summer weather. Immediate relief is provided to the stressed plant by giving it some shade. Anything you can rig up is OK. Total shade is not necessary, partial shade will help the tree recover from having it's root system disturbed. It should recover in one to three weeks, and the temporary shade can be removed.

I will try to shade it today. Thank you guys