Complex sentence: The next year, Su goes to Singapore and visits Chow's apartment where she calls Chow, who is working for a Singaporean newspaper, but she remains silent on the phone when Chow picks up.
Split into simpler sentences: The next year, Su goes to Singapore and visits Chow's apartment. She calls Chow, who is working for a Singaporean newspaper, but she remains silent when Chow picks up.