Hello Mr. Xiong! How much does your company invest in R&D each year and what percentage does it account for in revenue?

Crystal Optech: Hello: In 2019, 2020 and 2021, the proportion of the company's R&D investment to operating income was 5.28%, 6.48% and 6.41% respectively. In the first half of 2022, the proportion of the company's R&D investment to revenue was 5.72%. Thank you!