In this Jan. 13, 2017 photo, Wong Lai-ngan carves a mammoth tusk at the Lise Carving and Jewellrey workshop in Hong Kong. The decline of the city's once-flourishing ivory business is set to accelerate further after the Hong Kong and mainland Chinese governments unveiled plans in December to restrict local ivory trading. Wildlife activists hailed the news, saying that phasing out domestic markets is a key step in reducing demand for tusks fueling the illegal poaching decimating Africa's elephants. (AP Photo/Vincent Yu)