An article in the Yes! magazine that talked about the rumors that he was going out with Zhao Wei, then Ruby Lin and finally Chen De Lun. In the interview, YuPen was asked about his views and relationship on the three girls.
YuPen's answer;
About Zhao Wei:She's one of his really good friend, really smart and cute but because she already has a boyfriend, he never thought of her that way before.
About Ruby: She was really cute, and independent. She was also his really good friend but there's no chemistry between them.
About Chen De Lun: She was only his co-worker and friend, nothing else. The first time he met her, he thought she was really "cool."

Here's a brief summary of the news article from Express Weely issue #49 provided by Carina!
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Alec's section....
Coverstory:
Qns:What do you mean when you say that you and Vicki "have to feel"?
Ans: Ummm... first of all, we need to have chemistry. If we don't have this chemistry with each other than it would be difficult to act properly. She's a very smart girl, her eyes are very big, when she talks to you, her mind is also working at the same time. A bit like "Little Swallow" you know?

Reporter:When Alec speaks about Vicki, his usually serious face softens and he breaks into a smile. His feelings about Vicki isn't difficult to hide. Filming three dramas ( HZGG I&II and OHHJ ) as lovers and meeting each other everyday, Alec's "approval" of Vicki can be guessed and seen by the production crews who helped out in the filming of the dramas.

Reporter: It is said that you once tried to tell your Taiwan agent that if you continued to pair up with Vicki in anymore shows acting as a couple, you were afraid that as time passes, you will find it difficult to "get out of character" (referring to the show).
Qns: Did you actually fall for Vicki after some time?
Ans: At one time, yes...but now we're just good friends.
Qns: Did she know?
Ans: I think.....she should have known.
Qns: Did you express your love to her?
Ans: No...she already has a boyfriend, don't you know?

Alec says that he treats Ruby like a sister. He also stressed that the relationship between him, Vicki and Ruby has not made him feel uncomfortable. Alec said that they could still continue to work together because relationships and work are two different things and can't be mixed together.