diff --git a/labs/lab1/lab1_report_2016011330.pdf b/labs/lab1/lab1_report_2016011330.pdf
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diff --git a/labs/lab1/sleep.rs b/labs/lab1/sleep.rs
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+++ b/labs/lab1/sleep.rs
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+
+#![no_std]
+#![no_main]
+#![feature(alloc)]
+
+extern crate alloc;
+#[macro_use]
+extern crate rcore_user;
+
+
+
+use alloc::vec::Vec;
+use core::ptr;
+
+use rcore_user::io::get_line;
+
+
+use rcore_user::syscall::{sys_sleep, sys_vfork, sys_wait, sys_get_time, sys_exit};
+
+
+pub fn sleep(time: usize) -> i32 {
+    sys_sleep(time)
+}
+
+pub fn gettime_msec() -> u32{
+    sys_get_time() as u32
+}
+
+pub fn fork() -> i32 {
+    sys_vfork()
+}
+
+pub fn waitpid(pid: usize, code: *mut i32) -> i32 {
+    sys_wait(pid, code)
+}
+
+pub fn exit(error_code: usize) {
+    sys_exit(error_code);
+    println!("BUG: exit failed.");
+    while true {};
+}
+
+
+
+fn sleepy(pid: usize) {
+    let time: usize = 1;
+    for i in 0..10 {
+        sleep(time);
+        println!("sleep {} x {} slices.", i + 1, time);
+    }
+    exit(0);
+}
+
+
+// IMPORTANT: Must define main() like this
+#[no_mangle]
+pub fn main(){
+    let time = gettime_msec();
+    let mut pid1: usize = 0;
+    let mut exit_code = 0;
+
+    pid1 = fork() as usize;
+
+    if pid1 == 0 {
+        sleepy(pid1);
+    } else {
+        println!("child id is {}", pid1);
+    }
+
+    assert_eq!(waitpid(pid1, &mut exit_code), pid1 as i32);
+    assert_eq!(exit_code, 0);
+
+    println!("use {} msecs: {} to {}.", gettime_msec() - time, time, gettime_msec());
+    println!("sleep pass.");
+}