The sensitive issue of China-Taiwan reunification is subtly present throughout Great Wall My Love 追愛 (2011), a sentimental story about lost love, which is notably co-produced by the same Mainland production company (Jiuzhou Audio-Video Publishing Corporation 九洲音像出版公司) that created Wang Quanan's drama, Apart Together 團圓 (2010), also dealing with this theme. Both films begin with an older man traveling from Taiwan back…