Dear Mr. Jungsang, We apologize that we were unable to meet your expectations at Highland Jialai Hotel. As you mentioned during booking, the hot water system is functioning normally. However, due to lower water pressure on higher floors, the hot water may take longer to reach your desired temperature. To resolve this, we recommend letting the taps run cold water for 1-2 minutes before using the hot water. (Running cold water under the tap will help the hot water flow faster. Lower floors have higher water pressure, allowing the hot water to reach the taps more quickly.) Free Wi-Fi is available on all floors of the hotel. For a seamless connection, please connect to the Wi-Fi network of your floor. Highland Jialai Hotel will inform you about this and hope to welcome you again. Happy New Year! Thank you.