Who have private key

can O3 move with my balance? Does O3 have my private key?

That’s a good question. No, we absolutely cannot move your balance.
Here is why, The private key is generated on your device and never leave your device. You are truly in control of it.
PS. make sure to back up your private key safely.

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Ontology network requires 0.01 ONG as a transaction fee. When you make a transfer on its network. 0.01 ONG will be used as a transaction fee.

the picture shows 1 ont

Looks like it’s for an ONG claiming (syncing). Claim ONG contains two parts. Sync and the actual claim. Sync is to send any amount of ONT to the same address to help the network calculate how much ONG you can claim and also make it claimable.

Ok thank you