diff --git a/cvss/src/v3/mod.rs b/cvss/src/v3/mod.rs
index d3e1d1e..08744a8 100644
--- a/cvss/src/v3/mod.rs
+++ b/cvss/src/v3/mod.rs
@@ -19,9 +19,7 @@ use crate::metric::Metric;
 use crate::severity::SeverityType;
 use crate::v3::attack_complexity::AttackComplexityType;
 use crate::v3::attack_vector::AttackVectorType;
-use crate::v3::impact_metrics::{
-  AvailabilityImpactType, ConfidentialityImpactType, Impact, IntegrityImpactType,
-};
+use crate::v3::impact_metrics::{AvailabilityImpactType, ConfidentialityImpactType, Impact, IntegrityImpactType};
 use crate::v3::privileges_required::PrivilegesRequiredType;
 use crate::v3::scope::ScopeType;
 use crate::v3::user_interaction::UserInteractionType;
diff --git a/cvss/src/v4/exploit_maturity.rs b/cvss/src/v4/exploit_maturity.rs
index bb0d0cd..3023470 100644
--- a/cvss/src/v4/exploit_maturity.rs
+++ b/cvss/src/v4/exploit_maturity.rs
@@ -12,7 +12,7 @@ pub enum ExploitMaturity {
   /// Attacked(A) 已报告针对此漏洞的攻击；简化利用该漏洞的尝试解决方案已公开（或私下可用）。
   Attacked,
   /// POC(P) POC已公开；且未感知到针对此漏洞的利用尝试；且未感知到简化利用该漏洞的尝试的公开可用解决方案
-  POC,
+  Poc,
   /// Unreported(U) 未感知到POC公开；且未感知到针对此漏洞的利用尝试；且未感知到简化利用该漏洞的尝试的公开可用解决方案。
   Unreported,
 }
@@ -31,7 +31,7 @@ impl ExploitMaturity {
     match self {
       Self::NotDefined => None,
       Self::Attacked => Some(0),
-      Self::POC => Some(1),
+      Self::Poc => Some(1),
       Self::Unreported => Some(2),
     }
   }
@@ -53,7 +53,7 @@ impl FromStr for ExploitMaturity {
     let c = v.chars().next();
     match c {
       Some('A') => Ok(Self::Attacked),
-      Some('P') => Ok(Self::POC),
+      Some('P') => Ok(Self::Poc),
       Some('U') => Ok(Self::Unreported),
       Some('X') => Ok(Self::NotDefined),
       _ => Err(CVSSError::InvalidCVSS {
@@ -84,7 +84,7 @@ impl Metric for ExploitMaturity {
         worth: Worth::Worst,
         des: "".to_string(),
       },
-      Self::POC => Help {
+      Self::Poc => Help {
         worth: Worth::Worst,
         des: "".to_string(),
       },
@@ -99,7 +99,7 @@ impl Metric for ExploitMaturity {
     match self {
       Self::NotDefined => 0.0,
       Self::Attacked => 0.0,
-      Self::POC => 0.1,
+      Self::Poc => 0.1,
       Self::Unreported => 0.2,
     }
   }
@@ -108,7 +108,7 @@ impl Metric for ExploitMaturity {
     match self {
       Self::NotDefined => "X",
       Self::Attacked => "A",
-      Self::POC => "P",
+      Self::Poc => "P",
       Self::Unreported => "N",
     }
   }
diff --git a/cvss/src/v4/mod.rs b/cvss/src/v4/mod.rs
index 3f51cf3..886db0f 100644
--- a/cvss/src/v4/mod.rs
+++ b/cvss/src/v4/mod.rs
@@ -100,7 +100,7 @@ impl ExploitAbility {
       // 2: ["AV:P/PR:N/UI:N/", "AV:A/PR:L/UI:P/"]
       return Some(2);
     }
-    return None;
+    None
   }
   // EQ2: 0-(AC:L and AT:N)
   //      1-(not(AC:L and AT:N))
@@ -110,7 +110,7 @@ impl ExploitAbility {
     } else if !(self.attack_complexity.is_low() && self.attack_requirements.is_none()) {
       return Some(1);
     }
-    return None;
+    None
   }
 }
 
@@ -247,43 +247,42 @@ impl CVSS {
     let (eq1, eq2, eq3, eq4, eq5, eq6) = self.macro_vector();
     let mv = format!("{}{}{}{}{}{}", eq1, eq2, eq3, eq4, eq5, eq6);
     let score = lookup(&eq1, &eq2, &eq3, &eq4, &eq5, &eq6)
-      .unwrap_or(0.0)
-      .clone();
+      .unwrap_or(0.0);
     let mut lower = 0;
     let score_eq1_next_lower = if eq1 < 2 {
-      lower = lower + 1;
+      lower += 1;
       lookup(&(eq1 + 1), &eq2, &eq3, &eq4, &eq5, &eq6)
     } else {
       None
     };
     let score_eq2_next_lower = if eq2 < 1 {
-      lower = lower + 1;
+      lower += 1;
       lookup(&eq1, &(eq2 + 1), &eq3, &eq4, &eq5, &eq6)
     } else {
       None
     };
     let score_eq4_next_lower = if eq4 < 2 {
-      lower = lower + 1;
+      lower += 1;
       lookup(&eq1, &eq2, &eq3, &(eq4 + 1), &eq5, &eq6)
     } else {
       None
     };
     let score_eq5_next_lower = if eq5 < 2 {
-      lower = lower + 1;
+      lower += 1;
       lookup(&eq1, &eq2, &eq3, &eq4, &(eq5 + 1), &eq6)
     } else {
       None
     };
-    let score_eq3eq6_next_lower = if (eq3 == 1 && eq6 == 1) || (eq3 == 0 && eq6 == 1) {
-      lower = lower + 1;
+    let score_eq3eq6_next_lower = if  (eq3 == 0 || eq3 == 1) && eq6 == 1 {
+      lower += 1;
       lookup(&eq1, &eq2, &(eq3 + 1), &eq4, &eq5, &eq6)
     } else if eq3 == 1 && eq6 == 0 {
-      lower = lower + 1;
+      lower += 1;
       lookup(&eq1, &eq2, &eq3, &eq4, &eq5, &(eq6 + 1))
     } else if eq3 == 0 && eq6 == 0 {
       // multiple path take the one with higher score
       // 如果存在多个分数，取最大的分数
-      lower = lower + 1;
+      lower += 1;
       let left = lookup(&eq1, &eq2, &eq3, &eq4, &eq5, &(eq6 + 1)).unwrap_or(0.0);
       let right = lookup(&eq1, &eq2, &(eq3 + 1), &eq4, &eq5, &eq6).unwrap_or(0.0);
       let max_score = right.max(left);
@@ -348,8 +347,8 @@ impl CVSS {
         + normalized_severity_eq5)
         / lower as f32;
     }
-    let score = roundup(score - mean_distance);
-    score
+    
+    roundup(score - mean_distance)
   }
   // EQ6: 0-(CR:H and VC:H) or (IR:H and VI:H) or (AR:H and VA:H)
   //      1-not[(CR:H and VC:H) or (IR:H and VI:H) or (AR:H and VA:H)]
@@ -370,7 +369,7 @@ impl CVSS {
     {
       return Some(1);
     }
-    return None;
+    None
   }
   fn max_vectors(&self, macro_vector: String) -> Vec<String> {
     let mut vectors = vec![];
@@ -402,7 +401,7 @@ impl CVSS {
         }
       }
     }
-    return vectors;
+    vectors
   }
   fn severity_distances(&self, vectors: Vec<String>) -> (f32, f32, f32, f32, f32) {
     // 每个都和self这个cvss的分数比较，返回第一个大于self本身的
@@ -478,13 +477,13 @@ impl CVSS {
     let current_severity_distance_eq3eq6 = vc + vi + va + cr + ir + ar;
     let current_severity_distance_eq4 = sc + si + sa;
     let current_severity_distance_eq5 = 0.0;
-    return (
+    (
       current_severity_distance_eq1,
       current_severity_distance_eq2,
       current_severity_distance_eq3eq6,
       current_severity_distance_eq4,
       current_severity_distance_eq5,
-    );
+    )
   }
   fn macro_vector(&self) -> (u32, u32, u32, u32, u32, u32) {
     let eq1 = self.exploit_ability.eq1().unwrap_or_default();
@@ -493,7 +492,7 @@ impl CVSS {
     let eq4 = self.subsequent_impact.eq4().unwrap_or_default();
     let eq5 = self.exploit.eq5().unwrap_or_default();
     let eq6 = self.eq6().unwrap_or_default();
-    return (eq1, eq2, eq3, eq4, eq5, eq6);
+    (eq1, eq2, eq3, eq4, eq5, eq6)
   }
 }
 /// Roundup保留小数点后一位，小数点后第二位四舍五入。 例如, Roundup(4.02) = 4.0; 或者 Roundup(4.00) = 4.0
diff --git a/cvss/src/v4/subsequent_impact_metrics.rs b/cvss/src/v4/subsequent_impact_metrics.rs
index 0f665f7..7709633 100644
--- a/cvss/src/v4/subsequent_impact_metrics.rs
+++ b/cvss/src/v4/subsequent_impact_metrics.rs
@@ -358,6 +358,6 @@ impl SubsequentImpact {
     {
       return Some(2);
     }
-    return None;
+    None
   }
 }
diff --git a/cvss/src/v4/vulnerable_impact_metrics.rs b/cvss/src/v4/vulnerable_impact_metrics.rs
index 6872b97..811ae2e 100644
--- a/cvss/src/v4/vulnerable_impact_metrics.rs
+++ b/cvss/src/v4/vulnerable_impact_metrics.rs
@@ -365,6 +365,6 @@ impl VulnerableImpact {
     {
       return Some(2);
     }
-    return None;
+    None
   }
 }
diff --git a/helper/src/bin/cve_to_db.rs b/helper/src/bin/cve_to_db.rs
index 45d03ce..0cd3e95 100644
--- a/helper/src/bin/cve_to_db.rs
+++ b/helper/src/bin/cve_to_db.rs
@@ -5,12 +5,12 @@ use cvss::v2::ImpactMetricV2;
 use cvss::v3::ImpactMetricV3;
 use diesel::mysql::MysqlConnection;
 use helper::init_db_pool;
-use nvd_api::error::DBResult;
-use nvd_api::modules::cve_db::CreateCve;
-use nvd_api::modules::cve_product_db::CreateCveProductByName;
-use nvd_api::modules::product_db::{CreateProduct, QueryProductById};
-use nvd_api::modules::vendor_db::CreateVendors;
-use nvd_api::modules::{Cve, CveProduct, Product, Vendor};
+use nvd_server::error::DBResult;
+use nvd_server::modules::cve_db::CreateCve;
+use nvd_server::modules::cve_product_db::CreateCveProductByName;
+use nvd_server::modules::product_db::{CreateProduct, QueryProductById};
+use nvd_server::modules::vendor_db::CreateVendors;
+use nvd_server::modules::{Cve, CveProduct, Product, Vendor};
 use std::fs::File;
 use std::io::BufReader;
 use std::ops::DerefMut;
diff --git a/helper/src/bin/cwe_to_db.rs b/helper/src/bin/cwe_to_db.rs
index 594ee9f..04f65e0 100644
--- a/helper/src/bin/cwe_to_db.rs
+++ b/helper/src/bin/cwe_to_db.rs
@@ -1,8 +1,8 @@
 use cwe::weakness_catalog::WeaknessCatalog;
 use diesel::mysql::MysqlConnection;
 use helper::init_db_pool;
-use nvd_api::modules::cwe_db::CreateCwe;
-use nvd_api::modules::Cwe;
+use nvd_server::modules::cwe_db::CreateCwe;
+use nvd_server::modules::Cwe;
 use std::fs::File;
 use std::io::BufReader;
 use std::ops::DerefMut;
diff --git a/helper/src/bin/query.rs b/helper/src/bin/query.rs
index 8af35a5..ac42406 100644
--- a/helper/src/bin/query.rs
+++ b/helper/src/bin/query.rs
@@ -1,9 +1,9 @@
 use helper::init_db_pool;
-use nvd_api::modules::cve_db::QueryCve;
-use nvd_api::modules::cve_product_db::QueryCveProduct;
-use nvd_api::modules::product_db::QueryProduct;
-use nvd_api::modules::vendor_db::QueryVendor;
-use nvd_api::modules::{Cve, CveProduct, Product, Vendor};
+use nvd_server::modules::cve_db::QueryCve;
+use nvd_server::modules::cve_product_db::QueryCveProduct;
+use nvd_server::modules::product_db::QueryProduct;
+use nvd_server::modules::vendor_db::QueryVendor;
+use nvd_server::modules::{Cve, CveProduct, Product, Vendor};
 use std::ops::DerefMut;
 
 fn main() {
diff --git a/helper/tests/tests_cvss.rs b/helper/tests/tests_cvss.rs
index ecbd42c..1e5306c 100644
--- a/helper/tests/tests_cvss.rs
+++ b/helper/tests/tests_cvss.rs
@@ -3,13 +3,11 @@ mod tests {
   use cvss::severity::SeverityType;
   use cvss::v3::attack_complexity::AttackComplexityType;
   use cvss::v3::attack_vector::AttackVectorType;
-  use cvss::v3::impact_metrics::{
-    AvailabilityImpactType, ConfidentialityImpactType, IntegrityImpactType,
-  };
+  use cvss::v3::impact_metrics::{AvailabilityImpactType, ConfidentialityImpactType, Impact, IntegrityImpactType};
   use cvss::v3::privileges_required::PrivilegesRequiredType;
   use cvss::v3::scope::ScopeType;
   use cvss::v3::user_interaction::UserInteractionType;
-  use cvss::v3::{ExploitAbility, Impact};
+  use cvss::v3::ExploitAbility;
   use cvss::version::Version;
   use std::collections::HashMap;
   use std::str::FromStr;
diff --git a/nvd-server/src/main.rs b/nvd-server/src/main.rs
index 6b1ca6b..eafdfa5 100644
--- a/nvd-server/src/main.rs
+++ b/nvd-server/src/main.rs
@@ -1,7 +1,7 @@
 use actix_cors::Cors;
 use actix_web::{http, middleware, web, App, HttpServer};
-use nvd_api::api::api_route;
-use nvd_api::init_db_pool;
+use nvd_server::api::api_route;
+use nvd_server::init_db_pool;
 
 #[actix_web::main] // or #[tokio::main]
 async fn main() -> std::io::Result<()> {