What challenges China in protecting its cultural heritage?

Recently a new bronze ware museum, the largest of its kind in the country, opened in north China's Shanxi Province. Some pieces were recovered from overseas, involving a lot of efforts from the police. There are more than 25,000 stolen relics recovered by local police amid a campaign against gang crimes. Despite the progress China has made, there are still many more challenges to protect and restore the country's cultural heritage.