diff --git a/README_CN.md b/README_CN.md
index 2399438..f0fed5f 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -19,7 +19,7 @@ apt-get update && apt-get install -y \
   curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
 ```
 
-Download the source from the clamav [downloads page](https://www.clamav.net/downloads)
+从 clamav 官方下载源码 [downloads page](https://www.clamav.net/downloads)
 
 ```bash
 tar xzf clamav-[ver].tar.gz
diff --git a/clamav.go b/clamav.go
index 3ee2c2c..5b660ca 100644
--- a/clamav.go
+++ b/clamav.go
@@ -149,7 +149,7 @@ func (c *Clamav) CompileEngine() error {
 	return nil
 }
 
-// SetNum sets a number in the specified field of the engine configuration.
+// EngineSetNum sets a number in the specified field of the engine configuration.
 // Certain fields accept only 32-bit numbers, silently truncating the higher bits
 // of the engine config. See dat.go for more information.
 func (c *Clamav) EngineSetNum(field EngineField, num uint64) error {
@@ -162,7 +162,7 @@ func (c *Clamav) EngineSetNum(field EngineField, num uint64) error {
 	return nil
 }
 
-// GetNum acquires a number from the specified field of the engine configuration. Tests show that
+// EngineGetNum acquires a number from the specified field of the engine configuration. Tests show that
 // the ClamAV library will not overflow 32-bit fields, so a GetNum on a 32-bit field can safely be
 // cast to uint32.
 func (c *Clamav) EngineGetNum(field EngineField) (uint64, error) {
@@ -183,7 +183,7 @@ func (c *Clamav) Free() int {
 	return int(C.cl_engine_free((*C.struct_cl_engine)(c.engine)))
 }
 
-// ScanMapCb scans custom data
+// ScanMapCB scans custom data
 func (c *Clamav) ScanMapCB(fmap *Fmap, fileName string, context interface{}) (uint, string, error) {
 	var scanned C.ulong
 	var virusName *C.char
@@ -235,7 +235,7 @@ func (c *Clamav) ScanFile(path string) (uint, string, error) {
 	return 0, "", Strerr(ret)
 }
 
-// ScanFileCb scans a single file for viruses using the ClamAV databases and using callbacks from
+// ScanFileCB scans a single file for viruses using the ClamAV databases and using callbacks from
 // ClamAV to read/resolve file data. The callbacks can be used to scan files in memory, to scan multiple
 // files inside archives, etc. The function returns the number of bytes
 // read from the file (if found), the virus name and an error code.