Before I knew it, I was able to do staking. It looks like you need USDC in solana to buy AART. (For now, the only liquidity is AART/USDC) https://www.orca.so/ I did a lot of research on how to get USDC at a reasonable price, and I found some good ways.
1.Buy JPYC in yen. (in polygon network). https://app.jpyc.jp/
2.Swap USDC with JPYC.
3.Use allbridge to bridge USDC from polygon to solana. (apUSDC) https://app.allbridge.io/bridge?from=POL&to=SOL&asset=USDC
4.saber to swap apUSDC to USDC.(apUSDC) https://app.saber.so/#/swap
5.Swap USDC to AART with orca
6.solsea for staking!
2022/01/14 11:14 Added procedure in saber for apUSDC when bridging with Allbridge
That's all. Thank you very much for your cooperation.