Patrick Frater Asia Bureau Chief “Cyber Heist,” a crime thriller directed by Hong Kong’s Wong Hing-fan (“I’m Livin’ It”) and scripted by Soi Cheang (aka Cheang Pou Soi), took the top spot at the mainland Chinese box office over the weekend. It earned a very modest $6.2 million, according to data from consultancy Artisan Gateway. But that was enough to win on the quietest weekend since January’s Lunar New Year holiday season. “Cyber Heist” stars Aaron Kwok as a cyber security engineer who develops a state-of-the-art firewall that is capable of fending off online attacks against the global financial system. But he does not realize that in doing so he has stepped into a minefield that is even more dangerous. The picture also stars Lam Ka-tun and Simon Yam.