What is the logo of science and technology innovation board stock?

I happened to see the contents of investor education released by Weibo, TF Securities:

code segment 68****, code segment of science and technology innovation board stock or depositary receipts.

In addition, there are other signs worthy of attention:

The unprofitable sign "U" refers to the issuer's stocks or depositary receipts that are not profitable at the time of listing.

the voting rights difference sign "v" refers to the issuer's stocks or depositary receipts with voting rights difference arrangements.

the delisting risk sign "*ST" is used to warn the listed stocks of delisting risk, and this sign is put before the abbreviation of the company's stocks.

the delisting consolidation period is marked with "delisting". If the listed company's shares enter the delisting consolidation period, the company's stock is referred to as "Qian" with this logo.

Special note: the stocks marked with "*ST" and "delisting" will not enter the risk warning board for trading, and the relevant provisions on stock trading on the risk warning board are not applicable.