Multiple Chinese cities have announced cash rewards for tip-offs about people illegally crossing into the mainland from Hong Kong which is experiencing a massive fifth COVID-19 wave, overwhelming the local health system, state media reported on Saturday. Zhuhai, Huizhou and Dongguan in China's south Guangdong province close to Hong Kong have announced cash rewards for people who report suspected illegal crossings from the Hong Kong Special Administrative Region (HKSAR) amid reports of people fleeing to mainland by road and sea to escape the spread of the contagion, state-run Global Times reported on Saturday.