Now there is mining in the test network, you can read more in these documents.
1) QuarkChain Announces Official Launch of Testnet 2.0 Mining! https://medium.com/quarkchain-official/quarkchain-announces-official-launch-of-testnet-2-0-mining-8d16c9cd83ef
2) How is the mining reward calculated? https://medium.com/quarkchain-official/how-is-the-mining-reward-calculated-ab64a12ec877
3) General instructions for starting mining, updated as new versions are released: https://cryptored.ru/crypto-news/quarkchain-qkc-testnet-2-mining-in-test-network-tqkc-english-version/

All the issues in mining can be set in discharge or community miners in telegrams: https://t.me/quarkchainmining1