1.Open the FIS/ETH trading pair link on Uniswap, and click "Add Liquidity" button: https://v2.info.uniswap.org/pair/0x6da6c5c7eb4d840049f51ba1a79ac8caf3009466
2. Enter the "Add Liquidity" page and check your ETH and FIS balance.
3.Choose the amount of ETH and FIS that you will provide liquidity and click "Supply"
4.The next page shows the number of ETH and FIS that you want added in the liquidity pool, and LP token you will receive in FIS/ETH pool.
The picture shows you will get 1.2361 LP.
5.Click "Confirm Supply" and pay the gas fee, it can be successfully completed after about 1 minute.
When you get "your position" page, it means you have successfully provided liquidity for FIS /ETH.