What are the classic places to visit Shenzhen for two days in July?

Two days are tight, so I can only visit Shenzhen and several places. I recommend a classic place (seaside theme amusement park):

1. After the game (half a day), Yangmeikeng Valley Valley (half a day)

2. East OCT (one day)

Other options:

1. East OCT (one day)

2. Shopping in xiaomeisha (half day) Huaqiang North or East Gate (half day)

Or:

1. East OCT (one day)

2. Shenzhen Bay Park (half day) Helan Flower City (half day)