三天打鱼，两天晒网

sān tiān dǎ yú , liǎng tiān shài wǎngsantiandayu,liangtianshaiwang

1. lit. to fish for three days and sun-dry the nets for two days (proverb)
2. fig. not to persevere in doing sth
3. to do sth by fits and starts

Study it in Yanamino