Hardware clock and time zone problems

Not long ago, the Development Board needs to display the clock, but the default time is UTC time, so the time zone file is added. [Cpp] // copy the Shanghai Time Zone/usr/share/zoneinfo/Asia/Shanghai file to cp/usr/share/zoneinfo/Asia/Shanghai/etc/localtime under/etc however, when debugging the clock, after the time is set and the hardware is written, the boot speed is always 8 hours. The investigation found that the hardware is written using hwclock-w, and the local time is written by default, while the kernel is written according to UTC at startup, which is just increased by 8 hours. So replace hwclock-w with hwclock-uw to work normally. [Plain] hwclock: invalid option -- y BusyBox v1.15.2 (2009-10-26 18:24:41 CST) multi-call binary Usage: hwclock [-r | -- show] [-s | -- hctosys] [-w | -- systohc] [-l | -- localtime] [-u | -- utc] [-f FILE] Query and set hardware clock (RTC) options: -r Show hardware clock time-s Set system time from hardware clock-w Set hardware clock to system time-u Hardware clock is in UTC-l Hardware clock is in local time-f FILE use specified device (e.g. /dev/rtc2)