diff --git a/docs/theory/thinking-in-functional-programming.md b/docs/theory/thinking-in-functional-programming.md
new file mode 100644
index 000000000..4a90135b3
--- /dev/null
+++ b/docs/theory/thinking-in-functional-programming.md
@@ -0,0 +1,8 @@
+# 实用观点下的函数式编程思想
+
+## 一. 什么是函数
+
+## 二. 什么是Monad
+
+## 三. 从函数到函子
+
diff --git a/nop-sys/nop-sys-dao/src/test/java/io/nop/sys/dao/seq/TestSysSequenceGenerator.java b/nop-sys/nop-sys-dao/src/test/java/io/nop/sys/dao/seq/TestSysSequenceGenerator.java
new file mode 100644
index 000000000..9e59d28a1
--- /dev/null
+++ b/nop-sys/nop-sys-dao/src/test/java/io/nop/sys/dao/seq/TestSysSequenceGenerator.java
@@ -0,0 +1,51 @@
+package io.nop.sys.dao.seq;
+
+import io.nop.api.core.annotations.autotest.NopTestConfig;
+import io.nop.autotest.junit.JunitBaseTestCase;
+import io.nop.dao.DaoConstants;
+import io.nop.dao.api.IDaoProvider;
+import io.nop.sys.dao.entity.NopSysSequence;
+import jakarta.inject.Inject;
+import org.junit.jupiter.api.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+@NopTestConfig(localDb = true, initDatabaseSchema = true)
+public class TestSysSequenceGenerator extends JunitBaseTestCase {
+    static final Logger LOG = LoggerFactory.getLogger(TestSysSequenceGenerator.class);
+
+    @Inject
+    IDaoProvider daoProvider;
+
+    @Inject
+    SysSequenceGenerator generator;
+
+    @Test
+    public void testSequence() {
+        NopSysSequence seq = new NopSysSequence();
+        seq.setNextValue(100L);
+        seq.setSeqName("test");
+        seq.setCacheSize(200);
+        seq.setSeqType("default");
+        seq.setIsUuid(DaoConstants.NO_VALUE);
+        seq.setStepSize(1);
+
+        daoProvider.daoFor(NopSysSequence.class).saveEntity(seq);
+
+        String value = generator.generateString("test", true);
+        assertEquals("100", value);
+
+        LOG.info("before-generate");
+        value = generator.generateString("test", true);
+        assertEquals("101", value);
+
+        value = generator.generateString("test", true);
+        assertEquals("102", value);
+        LOG.info("after-generate");
+
+        NopSysSequence entity = daoProvider.daoFor(NopSysSequence.class).getEntityById(seq.orm_id());
+        assertEquals(300, entity.getNextValue());
+    }
+}