What should I do without a high school diploma when I study abroad in my second year of high school?

First, go abroad and finish high school.

You can enjoy high school life abroad. Because foreign high schools and universities are completely different. Moreover, foreign high schools are very different from domestic high schools. Apply for college comparative insurance directly after graduation.

Second, make a fake high school diploma in China.

As a diploma, the risk of accidents is almost zero. This can save a year and go directly to college or preparatory school. However, the adaptability of individuals to the new environment is much higher, because foreign universities study independently. And you have no family there, and your colleagues have to solve life problems.