In terms of strength, Li Nan is better, because Li Nan is good at engineering and science, and it is an old school.
But Donghua is in Shanghai, and its geographical advantage is very obvious.
I have been to both schools and know them well.
Donghua's historical background, academic strength and learning atmosphere are not as good as Li Nan University, and you may not know that Donghua is an aristocratic university to some extent, with golf courses and resorts.
If you want to study hard, learn some knowledge and continue your studies, I suggest Li Nan. If you want to graduate and find a good job in economically developed areas, go to Donghua! After all, there is the support of the Shanghai municipal government!