If the soundbar is battery-powered, insert the batteries, then press the power button. If the soundbar requires a power source, plug its power cable into a wall outlet or power strip, then press the power button. If your soundbar has a Toslink (also known as optical audio) port, you can use an optical audio cable to connect it to your PC. The port is usually labeled "TOSLINK" or "OPTICAL." Toslink is a standard optical audio cable typically used to connect home theater systems to digital electronics, such as DVD players. The port is usually labeled "TOSLINK," "OPTICAL," or "DIGITAL AUDIO OUT." If you're using a desktop PC, it should be on the back panel. If you have a laptop, it's likely on one of the sides. Once connected, your PC will send all audio through to the soundbar. Some slimmer laptop models may not have a TOSLINK port.

TL;DR in Chinese:
打开条形音箱的电源。 将Toslink线的一端插入条形音箱。 将线的另一端插入电脑。