They say love knows no boundaries, but young lovers looking to reach new heights in their relationship would do best to avoid Yao Mountain scenic spot in Central China's Henan province.

A warning board reading "Be cautious, it is risky to conduct intimate behavior aloft" has been posted at the boarding port of a ropeway to the cable cars.

A warning board reading "Be cautious, it is risky to conduct intimate behavior aloft" is seen at the boarding port of a ropeway to the cable cars at Yao Mountain scenic spot in Central China's Henan province, April 27.[Photo/CFP]

The board was installed to warn young lovers, especially those born after 1990s, not to get too intimate when riding the cable cars, to avoid accidents.

The move followed a widely circulated online video of a young couple tightly embracing each other and falling in a passionate kiss on the cable car.

But the warning words and lovemaking sign has sparked a mixed backlash and a wave of controversy.

One micro-blogger Laolushu voiced support to sign saying that such behavior needs to be managed and nobody wants their children to see this at such an early age. An opinion echoed by many. However, others alleged it was a publicity stunt by the scenic spot to arouse some form of attention.

A still image of the undated video shows a young couple acting intimately in a cable car in the scenic spot of Yao Mountain in Central China's Henan province.[Photo/dahe.cn]