diff --git a/document/route-dir.en_US.txt b/document/route-dir.en_US.txt
index 5abcb72..c03f27f 100644
--- a/document/route-dir.en_US.txt
+++ b/document/route-dir.en_US.txt
@@ -1,17 +1,17 @@
 IP Registration Directory Format Specification
-=======================
+==============================================
 
 According to the common usage of this VPN network, the IP allocation can be
 classified into the following rules, with its format normalized, as the
 file name of the routing distribution definition file:
 
-1. Point-to-Point /30 Tunnel： `10.127.0.x/30` （where x is divisible by 4）
-2. Contiguous Subnet： `10.127.x.y/z` (where z must be greater than 16）
-3. Peer-to-Peer： `PP,10.127.x.x~10.127.x.x` （IP on both sides is /32）
-4. Loopback Address： `10.127.255.x/32`
+1. Point-to-Point /30 Tunnel: `10.127.0.x/30` （where x is divisible by 4）
+2. Contiguous Subnet: `10.127.x.y/z` (where z must be greater than 16）
+3. Peer-to-Peer: `PP,10.127.x.x~10.127.x.x` （IP on both sides is /32）
+4. Loopback Address: `10.127.255.x/32`
 
 Definition Format
-========
+=================
 
 The content of the file can be divided into the following fields.
 To simplify processing, Shell Script variable definition syntax
@@ -19,26 +19,26 @@ will be used as the syntax of the definition file. In addition, variables must
 be defined in the same order as the following:
 
 	TYPE=
-	PROTO=		（only for peer-to-peer /30 tunnels and peer-to-peer /32 peers）
+	PROTO=		(only for peer-to-peer /30 tunnels and peer-to-peer /32 peers)
 	SUBNET= or PEER=<UPSTREAM IP>~<DOWNSTREAM IP>
-	UPSTREAM=	（only for peer-to-peer /30 tunnels and peer-to-peer /32 peers）
-	DOWNSTREAM=	（only for peer-to-peer /30 tunnels and peer-to-peer /32 peers）
+	UPSTREAM=	(only for peer-to-peer /30 tunnels and peer-to-peer /32 peers)
+	DOWNSTREAM=	(only for peer-to-peer /30 tunnels and peer-to-peer /32 peers)
 
 Detailed Information of Each Variable
-==============
+=====================================
 
 1. TYPE:	IP Usage Type
-	Available options are: TUN30, SUBNET, PP, LO （corresponding to the IP address
-	allocation type in the first section respectively）
+	Available options are: TUN30, SUBNET, PP, LO (corresponding to the IP address
+	allocation type in the first section respectively)
 
 2. PROTO:	VPN Protocol Used
 	Available options are: Tinc, WireGuard, GRE, IPsec/L2TP, IPsec/GRE, OpenVPN
 
 3. SUBNET:	Subnet Used
-	Format： Use CIDR Notation
+	Format: Use CIDR Notation
 
 4. PEER:	Peer-to-Peer Address
-	Format： <UPSTREAM IP>~<DOWNSTREAM IP>
+	Format: <UPSTREAM IP>~<DOWNSTREAM IP>
 
 5. UPSTREAM:	Upstream Node Name
 6. DOWNSTREAM:	Downstream Node Name