In fact, Sihwa had not watched much television. After she was born as an elfin, there was a Korean couple that was traveling and watching DVDs on the beach. She watched with them secretly. There were no commercials on the DVDs.
Fina was not interested in the television, but it heard the commercials every once in a while while Old Time Tea watched the television. Then it recognized the cell phone commercial line.
Since it was born with a sharp mind, it quickly realized that new cell phones charged more quickly, which was proved by Zhang Zian's actions. If he was hurried to go out, but the phone battery was low, he would usually charge it for a few minutes before leaving. It had not heard him complaining that the his phone battery was dead outside.