BTSE is an exchange offering futures, spot, and OTC services. On the BTSE platform, you can withdraw BTC balances as L-BTC, and any L-BTC you deposit is added to your BTC balance. By depositing BTC on the platform and withdrawing as L-BTC, you can effectively convert your BTC to L-BTC at a 1:1 ratio (minus withdrawal fees).
Step 1: Go to the Wallets tab.
Step 2: Deposit BTC to your BTSE account.
Step 3: After the BTC has arrived, select BTC from the Withdraw menu.
Step 4: Select Liquid from the pop-up window shown below.
Step 4: Enter a Liquid address from your Liquid wallet, enter a withdrawal amount, and click Confirm.
Step 5: The L-BTC should arrive in your Liquid wallet within a few minutes.