There is no strong public evidence that Lola Tung generally wears a wig. People usually ask because hair can look different between red carpets, scenes, lighting, and styling.
Why viewers wonder
On-screen hair is shaped by continuity, humidity, product, extensions, and camera lighting. A very polished part or sudden length change can make fans suspect a wig.
What is fair to say
Unless a stylist, actor, or production confirms a wig, the safe answer is that the look may involve professional styling or extensions, but a full wig is not confirmed.
Bottom line
Lola Tung wig claims should be treated as speculation unless a direct source confirms them.