diff --git a/Cargo.lock b/Cargo.lock
index aee6d98..bd56aa0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1123,7 +1123,7 @@ checksum = "3da647db441b5aad0454a41573a267edb82b67b82ca3b6a65d11c39ebce74a99"
 
 [[package]]
 name = "tzf-rs"
-version = "0.4.7"
+version = "0.4.8"
 dependencies = [
  "anyhow",
  "bytes",
diff --git a/Cargo.toml b/Cargo.toml
index 76f2c6c..f7fe53e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,7 @@ license = "MIT"
 name = "tzf-rs"
 readme = "README.md"
 repository = "https://github.com/ringsaturn/tzf-rs"
-version = "0.4.7"
+version = "0.4.8"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/src/lib.rs b/src/lib.rs
index 690361b..729147d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -385,11 +385,25 @@ impl DefaultFinder {
     /// ```
     #[must_use]
     pub fn get_tz_name(&self, lng: f64, lat: f64) -> &str {
-        let fuzzy_name = self.fuzzy_finder.get_tz_name(lng, lat);
-        if !fuzzy_name.is_empty() {
-            return fuzzy_name;
+        // The simplified polygon data contains some empty areas where not covered by any timezone.
+        // It's not a bug but a limitation of the simplified algorithm.
+        //
+        // To handle this, auto shift the point a little bit to find the nearest timezone.
+        for &dx in &[0.0, -0.001, 0.001] {
+            for &dy in &[0.0, -0.001, 0.001] {
+                let dlng = dx + lng;
+                let dlat = dy + lat;
+                let fuzzy_name = self.fuzzy_finder.get_tz_name(dlng, dlat);
+                if !fuzzy_name.is_empty() {
+                    return fuzzy_name;
+                }
+                let name = self.finder.get_tz_name(dlng, dlat);
+                if !name.is_empty() {
+                    return name;
+                }
+            }
         }
-        self.finder.get_tz_name(lng, lat)
+        ""
     }
 
     /// ```rust
diff --git a/tests/default.rs b/tests/default.rs
index 3940e2d..8c64119 100644
--- a/tests/default.rs
+++ b/tests/default.rs
@@ -17,6 +17,10 @@ mod tests {
         assert_eq!(finder.get_tz_name(-4.5706, 46.2747), "Etc/GMT");
         assert_eq!(finder.get_tz_name(-73.7729, 38.3530), "Etc/GMT+5");
         assert_eq!(finder.get_tz_name(114.1594, 22.3173), "Asia/Hong_Kong");
+
+        // Shenzhen actually, but we used a simplified polygon data.
+        assert_eq!(finder.get_tz_name(114.0668, 22.5153), "Asia/Hong_Kong");
+
         assert_eq!(
             finder.get_tz_name(12.452_899_553_691_935, 41.903_699_636_969_634),
             "Europe/Vatican"