Cross-chain protocols, which is called atomic swaps, allow you to exchange one cryptocurrency for another, even between two different blockchains, without the help from a third party. It’s basically a variation of smart contract technology and hash time locked contracts (HTLC) which the Qitmeer network is utilizing in other to create effectiveness on their network.
Qitmeer is dedicated to undertake the liquidity of whole Ismalic decentralized finance. So the design goal of Qitmeer is to build a simple and strong UTXO-based value transfer network, that is why Qitmeer itself doesn’t provide an on chain smart contract for the simplicity; instead, it prefers interoperability solutions to integrate various blockchains and applications all together.
Cryptocurrency is still a developing industry Qitmeer network is also improving it technology.